diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index a9e5e523..e9044573 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -59,7 +59,7 @@ jobs:
         # your codebase is analyzed, see https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/pr-checks.yml b/.github/workflows/pr-checks.yml
index d49d970d..dd9ee099 100644
--- a/.github/workflows/pr-checks.yml
+++ b/.github/workflows/pr-checks.yml
@@ -28,7 +28,7 @@ jobs:
     # based on.
     - name: Checkout head commits
       # https://github.com/actions/checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       #with:
         #ref: ${{github.head.sha}}
         #repository: ${{github.event.pull_request.head.repo.full_name}}
diff --git a/.github/workflows/push-checks.yml b/.github/workflows/push-checks.yml
index 51c9d47b..f6a1b0ef 100644
--- a/.github/workflows/push-checks.yml
+++ b/.github/workflows/push-checks.yml
@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
     - name: Set up Python
diff --git a/.github/workflows/submodule-update.yml b/.github/workflows/submodule-update.yml
index 5dbba221..e74e1020 100644
--- a/.github/workflows/submodule-update.yml
+++ b/.github/workflows/submodule-update.yml
@@ -24,7 +24,7 @@ jobs:
       OWNER: 'EDCD'
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           ref: '${{ env.CHECKOUT_BRANCH }}'
           submodules: true
diff --git a/.github/workflows/windows-build.yml b/.github/workflows/windows-build.yml
index 8418c2dd..79cc024f 100644
--- a/.github/workflows/windows-build.yml
+++ b/.github/workflows/windows-build.yml
@@ -27,7 +27,7 @@ jobs:
     name: Linux environment build steps
     runs-on: "ubuntu-latest"
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           submodules: true
       - name: Create .gitversion
@@ -81,7 +81,7 @@ jobs:
         shell: powershell
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           submodules: true
 
@@ -158,7 +158,7 @@ jobs:
         shell: powershell
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           submodules: true
 
diff --git a/EDMCLogging.py b/EDMCLogging.py
index 201648a2..a05ad107 100644
--- a/EDMCLogging.py
+++ b/EDMCLogging.py
@@ -193,7 +193,7 @@ class Logger:
         self.logger_channel_rotating.setFormatter(self.logger_formatter)
         self.logger.addHandler(self.logger_channel_rotating)
 
-    def get_logger(self) -> 'LoggerMixin':
+    def get_logger(self) -> LoggerMixin:
         """
         Obtain the self.logger of the class instance.
 
@@ -232,7 +232,7 @@ class Logger:
             logger.trace("Not changing log level because it's TRACE")  # type: ignore
 
 
-def get_plugin_logger(plugin_name: str, loglevel: int = _default_loglevel) -> 'LoggerMixin':
+def get_plugin_logger(plugin_name: str, loglevel: int = _default_loglevel) -> LoggerMixin:
     """
     Return a logger suitable for a plugin.
 
@@ -352,7 +352,7 @@ class EDMCContextFilter(logging.Filter):
             try:
                 args, _, _, value_dict = inspect.getargvalues(frame)
                 if len(args) and args[0] in ('self', 'cls'):
-                    frame_class: 'object' = value_dict[args[0]]
+                    frame_class: object = value_dict[args[0]]
 
                     if frame_class:
                         # See https://en.wikipedia.org/wiki/Name_mangling#Python for how name mangling works.
@@ -450,7 +450,7 @@ class EDMCContextFilter(logging.Filter):
         # Go up through stack frames until we find the first with a
         # type(f_locals.self) of logging.Logger.  This should be the start
         # of the frames internal to logging.
-        frame: 'FrameType' = getframe(0)
+        frame: FrameType = getframe(0)
         while frame:
             if isinstance(frame.f_locals.get('self'), logging.Logger):
                 frame = cast('FrameType', frame.f_back)  # Want to start on the next frame below
@@ -518,7 +518,7 @@ class EDMCContextFilter(logging.Filter):
         return module_name
 
 
-def get_main_logger(sublogger_name: str = '') -> 'LoggerMixin':
+def get_main_logger(sublogger_name: str = '') -> LoggerMixin:
     """Return the correct logger for how the program is being run."""
     if not os.getenv("EDMC_NO_UI"):
         # GUI app being run
@@ -537,4 +537,4 @@ base_logger_name = appcmdname if os.getenv('EDMC_NO_UI') else appname
 edmclogger = Logger(base_logger_name, loglevel=loglevel)
 for h in config_logger.handlers[:]:
     config_logger.removeHandler(h)
-logger: 'LoggerMixin' = edmclogger.get_logger()
+logger: LoggerMixin = edmclogger.get_logger()
diff --git a/EDMarketConnector.py b/EDMarketConnector.py
index e7bdf490..762afd41 100644
--- a/EDMarketConnector.py
+++ b/EDMarketConnector.py
@@ -54,7 +54,7 @@ if __name__ == '__main__':
         log_file_path.mkdir(exist_ok=True)
         log_file_path /= f'{appname}.log'
 
-        sys.stdout = sys.stderr = open(log_file_path, mode='wt', buffering=1)  # Do NOT use WITH here.
+        sys.stdout = sys.stderr = open(log_file_path, mode='w', buffering=1)  # Do NOT use WITH here.
     # TODO: Test: Make *sure* this redirect is working, else py2exe is going to cause an exit popup
 
 
@@ -216,7 +216,7 @@ if __name__ == '__main__':  # noqa: C901
 
     if args.capi_use_debug_access_token:
         import config as conf_module
-        with open(conf_module.config.app_dir_path / 'access_token.txt', 'r') as at:
+        with open(conf_module.config.app_dir_path / 'access_token.txt') as at:
             conf_module.capi_debug_access_token = at.readline().strip()
 
     level_to_set: int | None = None
@@ -476,7 +476,7 @@ class AppWindow:
         if sys.platform == 'win32' and not bool(config.get_int('no_systray')):
             from simplesystray import SysTrayIcon
 
-            def open_window(systray: 'SysTrayIcon', *args) -> None:
+            def open_window(systray: SysTrayIcon, *args) -> None:
                 self.w.deiconify()
 
             logfile_loc = pathlib.Path(config.app_dir_path / 'logs')
@@ -612,7 +612,7 @@ class AppWindow:
         self.status.grid(columnspan=2, sticky=tk.EW)
 
         for child in frame.winfo_children():
-            child.grid_configure(padx=self.PADX, pady=(
+            child.grid_configure(padx=self.PADX, pady=(  # type: ignore
                 sys.platform != 'win32' or isinstance(child, tk.Frame)) and 2 or 0)
 
         self.menubar = tk.Menu()
@@ -953,7 +953,7 @@ class AppWindow:
 
         self.cooldown()
 
-    def export_market_data(self, data: 'CAPIData') -> bool:  # noqa: CCR001
+    def export_market_data(self, data: CAPIData) -> bool:  # noqa: CCR001
         """
         Export CAPI market data.
 
@@ -1872,7 +1872,7 @@ class AppWindow:
             h.write(str(companion.session.capi_raw_data).encode(encoding='utf-8'))
 
     if sys.platform == 'win32':
-        def exit_tray(self, systray: 'SysTrayIcon') -> None:
+        def exit_tray(self, systray: SysTrayIcon) -> None:
             """Tray icon is shutting down."""
             exit_thread = threading.Thread(
                 target=self.onexit,
diff --git a/L10n/en.template b/L10n/en.template
index faac3259..f670e39c 100644
--- a/L10n/en.template
+++ b/L10n/en.template
@@ -839,3 +839,9 @@
 
 /* edastro_core.py: Settings>EDAstro - Label on checkbox for 'send data'; */
 "Send data to EDAstro" = "Send data to EDAstro";
+
+/* common_coreutils.py: Colonisation ship name, with title; In files: common_coreutils.py:81:81 */
+"System Colonisation Ship {NAME}" = "System Colonisation Ship {NAME}";
+
+/* common_coreutils.py: Unidentified colonisation ship; In files: common_coreutils.py:84:84 */
+"System Colonisation Ship" = "System Colonisation Ship";
diff --git a/PLUGINS.md b/PLUGINS.md
index 6fd20ef9..71aaec7a 100644
--- a/PLUGINS.md
+++ b/PLUGINS.md
@@ -163,6 +163,19 @@ circular imports.
 For an example of how this is done, look at the code in `plugins/common_coreutils.py`
 and the usage of these functions in other core plugins. 
 
+Plugins may import additional code modules from `load.py` in the usual way. Note
+that using an import statement like `import my_module` or `from my_module import
+foo` will only import one module with that name **across all plugins**. This can
+be used to create a shared library used by several plugins if used carefully,
+but may create a conflict if another plugin also has a module of the same name
+containing different code. For example if two plugins both contain a
+`widgets.py` file and both do `import widgets`, only one of the two modules will
+actually be imported.
+
+To avoid this issue, use a relative import statement such as `import .widgets`
+or `from .widgets import foo` to ensure that the module is loaded from the
+current plugin, even if the name conflicts with another plugin's code.
+
 ---
 
 ## Logging
diff --git a/commodity.py b/commodity.py
index 52c0f8b8..52c13928 100644
--- a/commodity.py
+++ b/commodity.py
@@ -1,9 +1,10 @@
 """Export various CSV formats."""
+
 # -*- coding: utf-8 -*-
 
 import time
+import csv
 from pathlib import Path
-
 from config import config
 from edmc_data import commodity_bracketmap as bracketmap
 
@@ -12,7 +13,7 @@ from edmc_data import commodity_bracketmap as bracketmap
 (COMMODITY_DEFAULT, COMMODITY_CSV) = range(2)
 
 
-def export(data, kind=COMMODITY_DEFAULT, filename=None) -> None:
+def export(data, kind=COMMODITY_DEFAULT, filename=None) -> None:  # noqa: CCR001
     """
     Export commodity data from the given CAPI data.
 
@@ -21,55 +22,48 @@ def export(data, kind=COMMODITY_DEFAULT, filename=None) -> None:
     :param filename: Filename to write to, or None for a standard format name.
     :return:
     """
-    querytime = config.get_int('querytime', default=int(time.time()))
+    querytime = config.get_int("querytime", default=int(time.time()))
 
     if not filename:
-        filename_system = data['lastSystem']['name'].strip()
-        filename_starport = data['lastStarport']['name'].strip()
-        filename_time = time.strftime('%Y-%m-%dT%H.%M.%S', time.localtime(querytime))
-        filename_kind = 'csv'
-        filename = f'{filename_system}.{filename_starport}.{filename_time}.{filename_kind}'
-        filename = Path(config.get_str('outdir')) / filename
-
-    if kind == COMMODITY_CSV:
-        sep = ';'  # BUG: for fixing later after cleanup
-        header = sep.join(('System', 'Station', 'Commodity', 'Sell', 'Buy', 'Demand', '', 'Supply', '', 'Date', '\n'))
-        rowheader = sep.join((data['lastSystem']['name'], data['lastStarport']['name']))
-
-    else:
-        sep = ','
-        header = sep.join(
-            ('System', 'Station', 'Commodity', 'Sell', 'Buy', 'Demand', '', 'Supply', '', 'Average', 'FDevID', 'Date\n')
+        sysname = data["lastSystem"]["name"].strip()
+        station = data["lastStarport"]["name"].strip()
+        timestamp = time.strftime("%Y-%m-%dT%H.%M.%S", time.localtime(querytime))
+        ext = "csv" if kind == COMMODITY_CSV else "scsv"
+        filename = (
+            Path(config.get_str("outdir")) / f"{sysname}.{station}.{timestamp}.{ext}"
         )
 
-        rowheader = sep.join((data['lastSystem']['name'], data['lastStarport']['name']))
+    system = data["lastSystem"]["name"]
+    station = data["lastStarport"]["name"]
 
-    with open(filename, 'wt') as h:  # codecs can't automatically handle line endings, so encode manually where required
-        h.write(header)
+    if kind == COMMODITY_CSV:
+        header = ["System", "Station", "Commodity", "Sell", "Buy", "Demand",
+                  "", "Supply", "", "Date"]
+    else:
+        header = ["System", "Station", "Commodity", "Sell", "Buy", "Demand",
+                  "", "Supply", "", "Average", "FDevID", "Date"]
 
-        for commodity in data['lastStarport']['commodities']:
-            line = sep.join((
-                rowheader,
-                commodity['name'],
-                commodity['sellPrice'] and str(int(commodity['sellPrice'])) or '',
-                commodity['buyPrice'] and str(int(commodity['buyPrice'])) or '',
-                str(int(commodity['demand'])) if commodity['demandBracket'] else '',
-                bracketmap[commodity['demandBracket']],
-                str(int(commodity['stock'])) if commodity['stockBracket'] else '',
-                bracketmap[commodity['stockBracket']]
-            ))
+    with open(filename, "w", newline="", encoding="utf-8") as output_file:
+        writer = csv.writer(output_file, delimiter=";" if kind == COMMODITY_DEFAULT else ",")
+
+        writer.writerow(header)
+
+        for commodity in data["lastStarport"]["commodities"]:
+            row = [
+                system,
+                station,
+                commodity["name"],
+                int(commodity["sellPrice"]) if commodity.get("sellPrice") is not None else "",
+                int(commodity["buyPrice"]) if commodity.get("buyPrice") is not None else "",
+                int(commodity["demand"]) if commodity.get("demandBracket") is not None else "",
+                bracketmap.get(commodity.get("demandBracket"), ""),
+                int(commodity["stock"]) if commodity.get("stockBracket") is not None else "",
+                bracketmap.get(commodity.get("stockBracket"), ""),
+            ]
 
             if kind == COMMODITY_DEFAULT:
-                line = sep.join(
-                    (
-                        line,
-                        str(int(commodity['meanPrice'])),
-                        str(commodity['id']),
-                        data['timestamp'] + '\n'
-                    )
-                )
+                mean = int(commodity["meanPrice"]) if commodity.get("meanPrice") is not None else ""
+                row.extend([mean, commodity["id"]])
 
-            else:
-                line = sep.join((line, data['timestamp'] + '\n'))
-
-            h.write(line)
+            row.append(data["timestamp"])
+            writer.writerow(row)
diff --git a/common_utils.py b/common_utils.py
index a6f78356..ce3c7986 100644
--- a/common_utils.py
+++ b/common_utils.py
@@ -29,23 +29,22 @@ def ensure_on_screen(self, parent: tk.Tk):
     :param self: The calling class instance of tk.TopLevel
     :param parent: The parent window
     """
-    if sys.platform != 'win32':
-        return
-    try:
-        # Get monitor info for the monitor containing the parent window
-        monitor = win32api.MonitorFromWindow(parent.winfo_id(), win32con.MONITOR_DEFAULTTONEAREST)
-        monitor_info = win32api.GetMonitorInfo(monitor)
-        work_area = monitor_info['Work']  # Gets the working area (excludes taskbar)
+    if sys.platform == 'win32':
+        try:
+            # Get monitor info for the monitor containing the parent window
+            monitor = win32api.MonitorFromWindow(parent.winfo_id(), win32con.MONITOR_DEFAULTTONEAREST)
+            monitor_info = win32api.GetMonitorInfo(monitor)
+            work_area = monitor_info['Work']  # Gets the working area (excludes taskbar)
 
-        # Calculate optimal position
-        x = max(work_area[0], min(parent.winfo_rootx(), work_area[2] - self.winfo_width()))
-        y = max(work_area[1], min(parent.winfo_rooty(), work_area[3] - self.winfo_height()))
+            # Calculate optimal position
+            x = max(work_area[0], min(parent.winfo_rootx(), work_area[2] - self.winfo_width()))
+            y = max(work_area[1], min(parent.winfo_rooty(), work_area[3] - self.winfo_height()))
 
-        # Update window position
-        self.geometry(f"+{x}+{y}")
+            # Update window position
+            self.geometry(f"+{x}+{y}")
 
-    except Exception as e:
-        logger.debug(f"Failed to ensure window is on screen: {e}")
+        except Exception as e:
+            logger.debug(f"Failed to ensure window is on screen: {e}")
 
 
 def log_locale(prefix: str) -> None:
diff --git a/companion.py b/companion.py
index 19f12a14..2c920144 100644
--- a/companion.py
+++ b/companion.py
@@ -29,7 +29,8 @@ import webbrowser
 from email.utils import parsedate
 from pathlib import Path
 from queue import Queue
-from typing import TYPE_CHECKING, Any, Mapping, TypeVar
+from typing import TYPE_CHECKING, Any, TypeVar
+from collections.abc import Mapping
 import requests
 import config as conf_module
 import killswitch
@@ -69,7 +70,7 @@ class CAPIData(UserDict):
 
     def __init__(
             self,
-            data: str | dict[str, Any] | 'CAPIData' | None = None,
+            data: str | dict[str, Any] | CAPIData | None = None,
             source_host: str | None = None,
             source_endpoint: str | None = None,
             request_cmdr: str | None = None
@@ -1204,7 +1205,7 @@ def fixup(data: CAPIData) -> CAPIData:  # noqa: C901, CCR001 # Can't be usefully
             if not (config.app_dir_path / 'FDevIDs' / f).is_file():
                 logger.warning(f'FDevID file {f} not found! Generating output without these commodity name rewrites.')
                 continue
-            with open(config.app_dir_path / 'FDevIDs' / f, 'r') as csvfile:
+            with open(config.app_dir_path / 'FDevIDs' / f) as csvfile:
                 reader = csv.DictReader(csvfile)
 
                 for row in reader:
@@ -1325,7 +1326,7 @@ def index_possibly_sparse_list(data: Mapping[str, V] | list[V], key: int) -> V:
     if isinstance(data, list):
         return data[key]
 
-    if isinstance(data, (dict, dict)):
+    if isinstance(data, dict):
         return data[str(key)]
 
     raise ValueError(f'Unexpected data type {type(data)}')
diff --git a/config/__init__.py b/config/__init__.py
index 83d73d71..94d84c14 100644
--- a/config/__init__.py
+++ b/config/__init__.py
@@ -43,7 +43,8 @@ import sys
 import tomllib
 import tomli_w
 from time import gmtime
-from typing import Any, Callable, Type, TypeVar
+from typing import Any, TypeVar
+from collections.abc import Callable
 import semantic_version
 from constants import GITVERSION_FILE, applongname, appname
 
@@ -474,7 +475,7 @@ class Config:
     @staticmethod
     def _suppress_call(
         func: Callable[..., _T],
-        exceptions: Type[BaseException] | list[Type[BaseException]] = Exception,
+        exceptions: type[BaseException] | list[type[BaseException]] = Exception,
         *args: Any,
         **kwargs: Any,
     ) -> _T | None:
diff --git a/config/linux.py b/config/linux.py
index 000946be..319e7e87 100644
--- a/config/linux.py
+++ b/config/linux.py
@@ -12,7 +12,7 @@ import sys
 from config import config_logger
 
 if sys.platform != "linux":
-    raise EnvironmentError("This file is for Linux only.")
+    raise OSError("This file is for Linux only.")
 
 
 import pathlib
@@ -137,7 +137,7 @@ class LinuxConfigMinimal:
 
     def close(self) -> None:
         """Release resources (stub)."""
-        self.config = None
+        del self.config
 
 
 def linux_helper(config: Config) -> Config:
diff --git a/config/windows.py b/config/windows.py
index ee654c4b..6868493e 100644
--- a/config/windows.py
+++ b/config/windows.py
@@ -21,7 +21,7 @@ if TYPE_CHECKING:
     from . import Config
 
 if sys.platform != "win32":
-    raise EnvironmentError("This file is for Windows only.")
+    raise OSError("This file is for Windows only.")
 
 REG_RESERVED_ALWAYS_ZERO = 0
 
diff --git a/coriolis-update-files.py b/coriolis-update-files.py
index 40d25fb3..f15d4067 100755
--- a/coriolis-update-files.py
+++ b/coriolis-update-files.py
@@ -45,7 +45,7 @@ if __name__ == "__main__":  # noqa: C901
     # Symbolic name from in-game name
     reverse_ship_map = {v: k for k, v in list(ship_name_map.items())}
 
-    bulkheads = list(outfitting.armour_map.keys())
+    bulkheads = list(outfitting.armour_map)
 
     ships = {}
     modules = {}
diff --git a/debug_webserver.py b/debug_webserver.py
index c4be2be3..545e62bd 100644
--- a/debug_webserver.py
+++ b/debug_webserver.py
@@ -7,7 +7,8 @@ import pathlib
 import threading
 import zlib
 from http import server
-from typing import Any, Callable, Literal
+from typing import Any, Literal
+from collections.abc import Callable
 from urllib.parse import parse_qs
 from config import config
 from EDMCLogging import get_main_logger
diff --git a/edmc_data.py b/edmc_data.py
index f29795f4..1a94b3ab 100644
--- a/edmc_data.py
+++ b/edmc_data.py
@@ -605,7 +605,7 @@ edmc_suit_symbol_localised = {
 # This is sourced from what the game is passed by the launcher, caveat emptor. It was mentioned that / is also
 # an option
 # This is only run once when this file is imported by something, no runtime cost or repeated expansions will occur
-__keys = list(edmc_suit_symbol_localised.keys())
+__keys = list(edmc_suit_symbol_localised)
 for lang in __keys:
     new_lang = lang.replace('\\', r'\\')
     new_lang_2 = lang.replace('\\', '/')
diff --git a/edshipyard.py b/edshipyard.py
index f7bceb75..e1c14e23 100644
--- a/edshipyard.py
+++ b/edshipyard.py
@@ -189,7 +189,7 @@ def export(data, filename=None) -> None:  # noqa: C901, CCR001
             raise
 
     if filename:
-        with open(filename, 'wt') as h:
+        with open(filename, 'w') as h:
             h.write(string)
         return
 
@@ -206,5 +206,5 @@ def export(data, filename=None) -> None:  # noqa: C901, CCR001
     timestamp = time.strftime('%Y-%m-%dT%H.%M.%S', time.localtime(querytime))
     filename = pathlib.Path(config.get_str('outdir')) / f'{ship}.{timestamp}.txt'
 
-    with open(filename, 'wt') as h:
+    with open(filename, 'w') as h:
         h.write(string)
diff --git a/hotkey/linux.py b/hotkey/linux.py
index 7e4b9862..33e9cd7e 100644
--- a/hotkey/linux.py
+++ b/hotkey/linux.py
@@ -6,7 +6,7 @@ from EDMCLogging import get_main_logger
 from hotkey import AbstractHotkeyMgr
 
 if sys.platform != 'linux':
-    raise EnvironmentError("This file is for Linux only.")
+    raise OSError("This file is for Linux only.")
 
 logger = get_main_logger()
 
diff --git a/hotkey/windows.py b/hotkey/windows.py
index b292e7a7..9d32edaa 100644
--- a/hotkey/windows.py
+++ b/hotkey/windows.py
@@ -16,7 +16,7 @@ from EDMCLogging import get_main_logger
 from hotkey import AbstractHotkeyMgr
 
 if sys.platform != 'win32':
-    raise EnvironmentError("This file is for Windows only.")
+    raise OSError("This file is for Windows only.")
 
 logger = get_main_logger()
 
diff --git a/journal_lock.py b/journal_lock.py
index 3e16b309..8d90314e 100644
--- a/journal_lock.py
+++ b/journal_lock.py
@@ -13,7 +13,7 @@ import tkinter as tk
 from enum import Enum
 from os import getpid as os_getpid
 from tkinter import ttk
-from typing import Callable
+from collections.abc import Callable
 from l10n import translations as tr
 from config import config
 from EDMCLogging import get_main_logger
diff --git a/killswitch.py b/killswitch.py
index 22a40049..bec23ba8 100644
--- a/killswitch.py
+++ b/killswitch.py
@@ -11,9 +11,10 @@ import json
 import threading
 from copy import deepcopy
 from typing import (
-    TYPE_CHECKING, Any, Callable, Mapping, MutableMapping, MutableSequence, NamedTuple, Sequence,
+    TYPE_CHECKING, Any, NamedTuple,
     TypedDict, TypeVar, cast, Union
 )
+from collections.abc import Callable, Mapping, MutableMapping, MutableSequence, Sequence
 import requests
 import semantic_version
 from semantic_version.base import Version
@@ -217,7 +218,7 @@ class KillSwitchSet:
     def __init__(self, kill_switches: list[KillSwitches]) -> None:
         self.kill_switches = kill_switches
 
-    def get_disabled(self, id: str, *, version: Union[Version, str] = _current_version) -> DisabledResult:
+    def get_disabled(self, id: str, *, version: Version | str = _current_version) -> DisabledResult:
         """
         Return whether the given feature ID is disabled by a killswitch for the given version.
 
diff --git a/l10n.py b/l10n.py
index 57c8651b..48197592 100755
--- a/l10n.py
+++ b/l10n.py
@@ -16,7 +16,8 @@ import re
 import sys
 from contextlib import suppress
 from os import listdir, sep
-from typing import Iterable, TextIO, cast
+from typing import TextIO, cast
+from collections.abc import Iterable
 import pathlib
 from config import config
 from EDMCLogging import get_main_logger
diff --git a/loadout.py b/loadout.py
index 144439c0..c465cdbd 100644
--- a/loadout.py
+++ b/loadout.py
@@ -33,7 +33,7 @@ def export(data: companion.CAPIData, requested_filename: str | None = None) -> N
     )  # pretty print
 
     if requested_filename is not None and requested_filename:
-        with open(requested_filename, 'wt') as h:
+        with open(requested_filename, 'w') as h:
             h.write(string)
         return
     if not requested_filename:
@@ -45,7 +45,7 @@ def export(data: companion.CAPIData, requested_filename: str | None = None) -> N
     regexp = re.compile(re.escape(ship) + r'\.\d\d\d\d-\d\d-\d\dT\d\d\.\d\d\.\d\d\.txt')
     oldfiles = sorted([x for x in listdir(config.get_str('outdir')) if regexp.match(x)])
     if oldfiles:
-        with open(Path(config.get_str('outdir')) / Path(oldfiles[-1]), 'rU') as h:
+        with open(Path(config.get_str('outdir')) / Path(oldfiles[-1])) as h:
             if h.read() == string:
                 return  # same as last time - don't write
 
@@ -57,5 +57,5 @@ def export(data: companion.CAPIData, requested_filename: str | None = None) -> N
     ship_time = time.strftime('%Y-%m-%dT%H.%M.%S', time.localtime(query_time))
     file_path = output_directory / f"{ship}.{ship_time}.txt"
 
-    with open(file_path, 'wt') as h:
+    with open(file_path, 'w') as h:
         h.write(string)
diff --git a/monitor.py b/monitor.py
index 3df0f85c..bc1d44f0 100644
--- a/monitor.py
+++ b/monitor.py
@@ -18,7 +18,8 @@ from collections import defaultdict
 from os import SEEK_END, SEEK_SET, listdir
 from os.path import basename, expanduser, getctime, isdir, join
 from time import gmtime, localtime, mktime, sleep, strftime, strptime, time
-from typing import TYPE_CHECKING, Any, BinaryIO, MutableMapping
+from typing import TYPE_CHECKING, Any, BinaryIO
+from collections.abc import MutableMapping
 import psutil
 import semantic_version
 import util_ships
@@ -347,7 +348,7 @@ class EDLogs(FileSystemEventHandler):
         """
         return bool(self.thread and self.thread.is_alive())
 
-    def on_created(self, event: 'FileSystemEvent') -> None:
+    def on_created(self, event: FileSystemEvent) -> None:
         """Watchdog callback when, e.g. client (re)started."""
         if not event.is_directory and self._RE_LOGFILE.search(str(basename(event.src_path))):
 
@@ -811,6 +812,10 @@ class EDLogs(FileSystemEventHandler):
                 self.state['OnFoot'] = False
                 self.state['Taxi'] = entry['Taxi']
 
+                if entry['Multicrew']:
+                    # Player has boarded another player's ship, but has not selected a role yet
+                    self.state['Role'] = 'Idle'
+
                 # We can't now have anything in the BackPack, it's all in the
                 # ShipLocker.
                 self.backpack_set_empty()
@@ -846,6 +851,10 @@ class EDLogs(FileSystemEventHandler):
                 self.state['Taxi'] = False
                 self.state['Dropship'] = False
 
+                # Since the player is now on foot, it's no longer possible to be multicrewing, so no
+                # need to actually check the multicrew parameter.
+                self.state['Role'] = None
+
             elif event_type == 'dropshipdeploy':
                 # We're definitely on-foot now
                 self.state['OnFoot'] = True
@@ -2267,7 +2276,7 @@ class EDLogs(FileSystemEventHandler):
         string = json.dumps(self.ship(False), ensure_ascii=False, indent=2, separators=(',', ': '))  # pretty print
         if filename:
             try:
-                with open(filename, 'wt', encoding='utf-8') as h:
+                with open(filename, 'w', encoding='utf-8') as h:
                     h.write(string)
 
             except UnicodeError:
@@ -2276,7 +2285,7 @@ class EDLogs(FileSystemEventHandler):
                                  )
 
                 try:
-                    with open(filename, 'wt') as h:
+                    with open(filename, 'w') as h:
                         h.write(string)
 
                 except OSError:
@@ -2291,7 +2300,7 @@ class EDLogs(FileSystemEventHandler):
 
         ship = util_ships.ship_file_name(self.state['ShipName'], self.state['ShipType'])
         regexp = re.compile(re.escape(ship) + r'\.\d{4}-\d\d-\d\dT\d\d\.\d\d\.\d\d\.txt')
-        oldfiles = sorted((x for x in listdir(config.get_str('outdir')) if regexp.match(x)))
+        oldfiles = sorted(x for x in listdir(config.get_str('outdir')) if regexp.match(x))
         if oldfiles:
             try:
                 with open(join(config.get_str('outdir'), oldfiles[-1]), encoding='utf-8') as h:
@@ -2323,13 +2332,13 @@ class EDLogs(FileSystemEventHandler):
         filename = join(config.get_str('outdir'), f'{ship}.{ts}.txt')
 
         try:
-            with open(filename, 'wt', encoding='utf-8') as h:
+            with open(filename, 'w', encoding='utf-8') as h:
                 h.write(string)
 
         except UnicodeError:
             logger.exception("UnicodeError writing ship loadout to new filename with utf-8 encoding, trying without...")
             try:
-                with open(filename, 'wt') as h:
+                with open(filename, 'w') as h:
                     h.write(string)
 
             except OSError:
diff --git a/myNotebook.py b/myNotebook.py
index 46f79622..c28d7873 100644
--- a/myNotebook.py
+++ b/myNotebook.py
@@ -14,6 +14,7 @@ import tkinter as tk
 from tkinter import ttk, messagebox
 from PIL import ImageGrab
 from l10n import translations as tr
+from collections.abc import Callable
 
 if sys.platform == 'win32':
     PAGEFG = 'SystemWindowText'
@@ -50,10 +51,18 @@ class Label(ttk.Label):
     """Custom ttk.Label class to fix some display issues."""
 
     def __init__(self, master: ttk.Frame | None = None, **kw):
-        kw['foreground'] = kw.pop('foreground', PAGEFG if sys.platform == 'win32'
-                                  else ttk.Style().lookup('TLabel', 'foreground'))
-        kw['background'] = kw.pop('background', PAGEBG if sys.platform == 'win32'
-                                  else ttk.Style().lookup('TLabel', 'background'))
+        if sys.platform == 'win32':
+            fg_color = PAGEFG
+        else:
+            fg_color = ttk.Style().lookup('TLabel', 'foreground')
+
+        if sys.platform == 'win32':
+            bg_color = PAGEBG
+        else:
+            bg_color = ttk.Style().lookup('TLabel', 'background')
+
+        kw['foreground'] = kw.pop('foreground', fg_color)
+        kw['background'] = kw.pop('background', bg_color)
         super().__init__(master, **kw)
 
 
@@ -171,6 +180,7 @@ class ScrollableNotebook(Notebook):
         self,
         master: ttk.Frame | None = None,
         tabmenu: bool = False,
+        on_tab_change: Callable | None = None,
         *args,
         **kwargs
     ) -> None:
@@ -191,6 +201,8 @@ class ScrollableNotebook(Notebook):
         self.notebookTab: ttk.Notebook = ttk.Notebook(self, **kwargs)
         self.notebookTab.place(x=0, y=0)
         self.notebookTab.bind("<<NotebookTabChanged>>", self._tab_changer)
+        if on_tab_change:
+            self.notebookTab.bind("<<NotebookTabChanged>>", on_tab_change, add='+')
 
         # Sliding frame and controls
         slide_frame: ttk.Frame = ttk.Frame(self)
diff --git a/outfitting.py b/outfitting.py
index 4b014e48..3256da31 100644
--- a/outfitting.py
+++ b/outfitting.py
@@ -296,7 +296,7 @@ def export(data, filename) -> None:
     header = 'System,Station,Category,Name,Mount,Guidance,Ship,Class,Rating,FDevID,Date\n'
     rowheader = f'{data["lastSystem"]["name"]},{data["lastStarport"]["name"]}'
 
-    with open(filename, 'wt') as h:
+    with open(filename, 'w') as h:
         h.write(header)
         for v in data["lastStarport"].get("modules", {}).values():
             try:
diff --git a/plug.py b/plug.py
index 1a8779f7..77d73f9e 100644
--- a/plug.py
+++ b/plug.py
@@ -18,7 +18,8 @@ import tkinter as tk
 from datetime import datetime, timedelta, timezone
 from pathlib import Path
 from tkinter import ttk
-from typing import Any, Mapping, MutableMapping
+from typing import Any
+from collections.abc import Mapping, MutableMapping
 
 import companion
 import myNotebook as nb  # noqa: N813
@@ -48,13 +49,20 @@ last_error = LastError()
 class Plugin:
     """An EDMC plugin."""
 
-    def __init__(self, name: str, loadfile: Path | None, plugin_logger: logging.Logger | None):  # noqa: CCR001
+    def __init__(  # noqa: CCR001
+        self,
+        name: str,
+        loadfile: Path | None,
+        plugin_logger: logging.Logger | None,
+        internal: bool = False
+    ):
         """
         Load a single plugin.
 
         :param name: Base name of the file being loaded from.
         :param loadfile: Full path/filename of the plugin.
         :param plugin_logger: The logging instance for this plugin to use.
+        :param internal: True to use internal plugin loader logic. Defaults to False.
         :raises Exception: Typically, ImportError or OSError
         """
         self.name: str = name  # Display name.
@@ -65,14 +73,19 @@ class Plugin:
         if loadfile:
             logger.info(f'loading plugin "{name.replace(".", "_")}" from "{loadfile}"')
             try:
-                filename = 'plugin_'
-                filename += name.encode(encoding='ascii', errors='replace').decode('utf-8').replace('.', '_')
-                spec = importlib.util.spec_from_file_location(filename, loadfile)
-                # Replaces older load_module() code. Includes a safety check that the module name is set.
-                if spec is not None and spec.loader is not None:
-                    module = importlib.util.module_from_spec(spec)
-                    sys.modules[module.__name__] = module
-                    spec.loader.exec_module(module)
+                if internal:
+                    filename = 'plugin_'
+                    filename += name.encode(encoding='ascii', errors='replace').decode('utf-8').replace('.', '_')
+                    spec = importlib.util.spec_from_file_location(filename, loadfile)
+                    # Replaces older load_module() code. Includes a safety check that the module name is set.
+                    if spec is not None and spec.loader is not None:
+                        module = importlib.util.module_from_spec(spec)
+                        sys.modules[module.__name__] = module
+                        spec.loader.exec_module(module)
+                else:
+                    module = importlib.import_module('.load', name)
+
+                if module:
                     if getattr(module, 'plugin_start3', None):
                         newname = module.plugin_start3(Path(loadfile).resolve().parent)
                         self.name = str(newname) if newname else self.name
@@ -170,7 +183,7 @@ def _load_internal_plugins():
             try:
                 plugin_name = name[:-3]
                 plugin_path = config.internal_plugin_dir_path / name
-                plugin = Plugin(plugin_name, plugin_path, logger)
+                plugin = Plugin(plugin_name, plugin_path, logger, internal=True)
                 plugin.folder = None
                 internal.append(plugin)
             except Exception:
diff --git a/plugins/common_coreutils.py b/plugins/common_coreutils.py
index 6b90d4dc..2e3b58ae 100644
--- a/plugins/common_coreutils.py
+++ b/plugins/common_coreutils.py
@@ -22,13 +22,15 @@ referenced in this file (or only in any other core plugin), and if so...
 # pylint: disable=import-error
 from __future__ import annotations
 
-from typing import Any, Mapping, cast
+from typing import Any, cast
+from collections.abc import Mapping
 import tkinter as tk
 import base64
 import gzip
 import io
 import json
 import os
+import re
 import myNotebook as nb  # noqa: N813
 from EDMCLogging import get_main_logger
 from companion import CAPIData
@@ -47,6 +49,49 @@ SEPY = 10  # seperator line spacing
 STATION_UNDOCKED = '×'  # "Station" name to display when not docked = U+00D7
 
 
+# Known colonisation ship names match one of the following:
+#   "$EXT_PANEL_ColonisationShip;"
+#   "$EXT_PANEL_ColonisationShip; <ship name>" with "<ship name>" being eg; "Okawara Horizons"
+#   "$EXT_PANEL_ColonisationShip:#index=<number>;"
+#   "$EXT_PANEL_ColonisationShip:#index=<number>; <ship name>"
+_RE_COLONISATION_SHIP = re.compile(r'\$EXT_PANEL_ColonisationShip(?::#index=(\d+))?;(?: (.+))?')
+
+
+def localised_name(value: str | None) -> str | None:
+    """
+    Handle localisation of strings in places like station names.
+
+    This is currently an issue for system colonisation ships that have a station name along the
+    lines of "$EXT_PANEL_ColonisationShip; Okawara Horizons" when written to the journal, but would
+    be better displayed as "System Colonisation Ship Okawara Horizona" (or other appropriately
+    localised equivalent).
+
+    If no (known) localisable strings are present, the input will be returned unmodified.
+
+    :param value: The non-localised string.
+    :return: The localised string, or None if the input was None.
+    """
+    if value is None:
+        return None
+
+    colonisation_ship_match = _RE_COLONISATION_SHIP.match(value)
+    if colonisation_ship_match:
+        ship_index = colonisation_ship_match.group(1)
+        ship_name = colonisation_ship_match.group(2)
+        # Use the ship's index as its name if no name was provided.
+        ship_id = ship_name or ship_index
+
+        if ship_id:
+            # LANG: Colonisation ship name, with title
+            value = tr.tl("System Colonisation Ship {NAME}").format(NAME=ship_id)
+
+        else:
+            # LANG: Unidentified colonisation ship
+            value = tr.tl("System Colonisation Ship")
+
+    return value
+
+
 def plugin_start3(plugin_dir: str) -> str:
     """
     Start the plugin.
@@ -121,7 +166,7 @@ def station_link_common(data: CAPIData, this):
     :param this: The module global from the calling module.
     """
     if data['commander']['docked'] or this.on_foot and this.station_name:
-        this.station_link['text'] = this.station_name
+        this.station_link['text'] = localised_name(this.station_name)
     elif data['lastStarport']['name'] and data['lastStarport']['name'] != "":
         this.station_link['text'] = STATION_UNDOCKED
     else:
@@ -163,12 +208,14 @@ def station_name_setter_common(this):
     :param this: The module global from the calling module.
     """
     to_set: str = cast(str, this.station_name)
+
     if not to_set:
         if this.system_population is not None and this.system_population > 0:
             to_set = STATION_UNDOCKED
         else:
             to_set = ''
 
+    to_set = str(localised_name(to_set))
     this.station_link['text'] = to_set
 
 
diff --git a/plugins/coriolis.py b/plugins/coriolis.py
index 89f128f7..be0bd4be 100644
--- a/plugins/coriolis.py
+++ b/plugins/coriolis.py
@@ -22,7 +22,8 @@ referenced in this file (or only in any other core plugin), and if so...
 # pylint: disable=import-error
 from __future__ import annotations
 
-from typing import Any, Mapping
+from typing import Any
+from collections.abc import Mapping
 import tkinter as tk
 from tkinter import ttk
 import myNotebook as nb  # noqa: N813 # its not my fault.
diff --git a/plugins/eddn.py b/plugins/eddn.py
index 6410d0b2..8b783c8f 100644
--- a/plugins/eddn.py
+++ b/plugins/eddn.py
@@ -33,7 +33,8 @@ from tkinter import ttk
 from platform import system
 from textwrap import dedent
 from threading import Lock
-from typing import Any, Iterator, Mapping, MutableMapping
+from typing import Any
+from collections.abc import Iterator, Mapping, MutableMapping
 import requests
 import companion
 import edmc_data
@@ -152,7 +153,7 @@ class EDDNSender:
         r"unable to validate.',\)]$"
     )
 
-    def __init__(self, eddn: 'EDDN', eddn_endpoint: str) -> None:
+    def __init__(self, eddn: EDDN, eddn_endpoint: str) -> None:
         """
         Prepare the system for processing messages.
 
diff --git a/plugins/edsm.py b/plugins/edsm.py
index e1e6b168..46c8ef4e 100644
--- a/plugins/edsm.py
+++ b/plugins/edsm.py
@@ -29,7 +29,8 @@ from queue import Queue
 from threading import Thread
 from time import sleep
 from tkinter import ttk
-from typing import Any, Literal, Mapping, MutableMapping, cast, Sequence
+from typing import Any, Literal, cast
+from collections.abc import Mapping, MutableMapping, Sequence
 import requests
 import killswitch
 import monitor
@@ -43,7 +44,7 @@ from ttkHyperlinkLabel import HyperlinkLabel
 from l10n import translations as tr
 from plugins.common_coreutils import (api_keys_label_common, PADX, PADY, BUTTONX, SEPY, BOXY, STATION_UNDOCKED,
                                       show_pwd_var_common, station_link_common, this_format_common,
-                                      cmdr_data_initial_common)
+                                      cmdr_data_initial_common, localised_name)
 
 
 # TODO:
@@ -543,7 +544,7 @@ entry: {entry!r}'''
                 to_set = ''
 
         if this.station_link:
-            this.station_link['text'] = to_set
+            this.station_link['text'] = localised_name(to_set)
             this.station_link['url'] = station_url(str(this.system_name), str(this.station_name))
             this.station_link.update_idletasks()
 
diff --git a/plugins/edsy.py b/plugins/edsy.py
index b1bdbaf1..109bb2f0 100644
--- a/plugins/edsy.py
+++ b/plugins/edsy.py
@@ -20,7 +20,8 @@ referenced in this file (or only in any other core plugin), and if so...
 """
 from __future__ import annotations
 
-from typing import Any, Mapping
+from typing import Any
+from collections.abc import Mapping
 from plugins.common_coreutils import shipyard_url_common  # pylint: disable=E0401
 
 
diff --git a/plugins/inara.py b/plugins/inara.py
index 56df1e0e..be3f517b 100644
--- a/plugins/inara.py
+++ b/plugins/inara.py
@@ -31,7 +31,8 @@ from datetime import datetime, timedelta, timezone
 from operator import itemgetter
 from threading import Lock, Thread
 from tkinter import ttk
-from typing import Any, Callable, Deque, Mapping, NamedTuple, Sequence, cast, Union
+from typing import Any, Deque, NamedTuple, cast, Union
+from collections.abc import Callable, Mapping, Sequence
 import requests
 import edmc_data
 import killswitch
@@ -105,7 +106,6 @@ class This:
         self.materials: list[dict[str, Any]] | None = None
         self.last_credits: int = 0  # Send credit update soon after Startup / new game
         self.storedmodules: list[dict[str, Any]] | None = None
-        self.embarked: bool = False  # Boarded Someone Else's Ship? Should always start as False.
         self.loadout: dict[str, Any] | None = None
         self.fleet: list[dict[str, Any]] | None = None
         self.shipswap: bool = False  # just swapped ship
@@ -533,17 +533,8 @@ def journal_entry(  # noqa: C901, CCR001
                 power_data = {'powerName': entry["Power"], 'rankValue': entry["Rank"]}
                 new_add_event('setCommanderRankPower', entry['timestamp'], power_data)
 
-            # Handle Embark/Disembark Events
-            if event_name == 'Embark':
-                this.embarked = True
-                this.multicrew = True
-
-            if event_name == 'Disembark':
-                this.embarked = False
-                this.multicrew = False
-
             # Ship change
-            if event_name == 'Loadout' and this.shipswap:
+            elif event_name == 'Loadout' and this.shipswap:
                 this.loadout = make_loadout(state)
                 new_add_event('setCommanderShipLoadout', entry['timestamp'], this.loadout)
                 this.shipswap = False
@@ -831,7 +822,7 @@ def journal_entry(  # noqa: C901, CCR001
                 for ship in this.fleet:
                     new_add_event('setCommanderShip', entry['timestamp'], ship)
         # Loadout
-        if event_name == 'Loadout' and not this.embarked:  # Ignore Loadout Events if Embarked
+        if event_name == 'Loadout':
             loadout = make_loadout(state)
             if this.loadout != loadout:
                 this.loadout = loadout
diff --git a/prefs.py b/prefs.py
index 71e03087..9b82704a 100644
--- a/prefs.py
+++ b/prefs.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 """EDMC preferences library."""
 from __future__ import annotations
 
@@ -14,7 +13,8 @@ from os import system
 from tkinter import colorchooser as tkColorChooser  # type: ignore # noqa: N812
 from tkinter import ttk
 from types import TracebackType
-from typing import Any, Callable, Optional, Type
+from typing import Any
+from collections.abc import Callable
 import myNotebook as nb  # noqa: N813
 import plug
 from config import appversion_nobuild, config
@@ -170,8 +170,8 @@ class AutoInc(contextlib.AbstractContextManager):
 
     def __exit__(
         self,
-        exc_type: Optional[Type[BaseException]], exc_value: Optional[BaseException], traceback: Optional[TracebackType]
-    ) -> Optional[bool]:
+        exc_type: type[BaseException] | None, exc_value: BaseException | None, traceback: TracebackType | None
+    ) -> bool | None:
         """Do nothing."""
         return None
 
@@ -241,7 +241,7 @@ if sys.platform == 'win32':
 class PreferencesDialog(tk.Toplevel):
     """The EDMC preferences dialog."""
 
-    def __init__(self, parent: tk.Tk, callback: Optional[Callable]):
+    def __init__(self, parent: tk.Tk, callback: Callable | None):
         super().__init__(parent)
 
         self.parent = parent
@@ -265,7 +265,7 @@ class PreferencesDialog(tk.Toplevel):
 
         self.cmdr: str | bool | None = False  # Note if Cmdr changes in the Journal
         self.is_beta: bool = False  # Note if Beta status changes in the Journal
-        self.cmdrchanged_alarm: Optional[str] = None  # This stores an ID that can be used to cancel a scheduled call
+        self.cmdrchanged_alarm: str | None = None  # This stores an ID that can be used to cancel a scheduled call
 
         # Set up the main frame
         frame = ttk.Frame(self)
@@ -276,8 +276,7 @@ class PreferencesDialog(tk.Toplevel):
         frame.rowconfigure(0, weight=1)
         frame.rowconfigure(1, weight=0)
 
-        notebook: nb.ScrollableNotebook = nb.ScrollableNotebook(frame, tabmenu=True)
-        notebook.bind('<<NotebookTabChanged>>', self.tabchanged)  # Recompute on tab change
+        notebook: nb.ScrollableNotebook = nb.ScrollableNotebook(frame, tabmenu=True, on_tab_change=self.tabchanged)
 
         self.PADX = 10
         self.BUTTONX = 12  # indent Checkbuttons and Radiobuttons
@@ -310,6 +309,11 @@ class PreferencesDialog(tk.Toplevel):
         self.cmdrchanged()
         self.themevarchanged()
 
+        # Init hotkey attributes to avoid linter errors
+        self.hotkey_text: ttk.Entry
+        self.hotkey_only_btn: nb.Checkbutton
+        self.hotkey_play_btn: nb.Checkbutton
+
         # disable hotkey for the duration
         hotkeymgr.unregister()
 
@@ -1132,7 +1136,7 @@ class PreferencesDialog(tk.Toplevel):
         """Handle preferences active tab changing."""
         self.outvarchanged()
 
-    def outvarchanged(self, event: Optional[tk.Event] = None) -> None:
+    def outvarchanged(self, event: tk.Event | None = None) -> None:
         """Handle Output tab variable changes."""
         self.displaypath(self.outdir, self.outdir_entry)
         self.displaypath(self.logdir, self.logdir_entry)
@@ -1236,14 +1240,14 @@ class PreferencesDialog(tk.Toplevel):
         self.theme_button_0['state'] = state
         self.theme_button_1['state'] = state
 
-    def hotkeystart(self, event: 'tk.Event[Any]') -> None:
+    def hotkeystart(self, event: tk.Event[Any]) -> None:
         """Start listening for hotkeys."""
         event.widget.bind('<KeyPress>', self.hotkeylisten)
         event.widget.bind('<KeyRelease>', self.hotkeylisten)
         event.widget.delete(0, tk.END)
         hotkeymgr.acquire_start()
 
-    def hotkeyend(self, event: 'tk.Event[Any]') -> None:
+    def hotkeyend(self, event: tk.Event[Any]) -> None:
         """Stop listening for hotkeys."""
         event.widget.unbind('<KeyPress>')
         event.widget.unbind('<KeyRelease>')
@@ -1254,7 +1258,7 @@ class PreferencesDialog(tk.Toplevel):
             # LANG: No hotkey/shortcut set
             hotkeymgr.display(self.hotkey_code, self.hotkey_mods) if self.hotkey_code else tr.tl('None'))
 
-    def hotkeylisten(self, event: 'tk.Event[Any]') -> str:
+    def hotkeylisten(self, event: tk.Event[Any]) -> str:
         """
         Hotkey handler.
 
diff --git a/protocol.py b/protocol.py
index cec4333a..774a012e 100644
--- a/protocol.py
+++ b/protocol.py
@@ -12,7 +12,7 @@ import os
 import sys
 import threading
 from urllib import parse
-from typing import TYPE_CHECKING, Type
+from typing import TYPE_CHECKING
 from config import config
 from constants import appname, protocolhandler_redirect
 from EDMCLogging import get_main_logger
@@ -61,7 +61,7 @@ if config.auth_force_edmc_protocol or (  # noqa: C901
 ):
     # This could be false if you use auth_force_edmc_protocol, but then you get to keep the pieces
     if sys.platform != "win32":
-        raise EnvironmentError("This code is for Windows only.")
+        raise OSError("This code is for Windows only.")
     # spell-checker: words HBRUSH HICON WPARAM wstring WNDCLASS HMENU HGLOBAL
     from ctypes import (  # type: ignore
         windll,
@@ -434,7 +434,7 @@ else:  # Linux / Run from source
             )
 
 
-def get_handler_impl() -> Type[GenericProtocolHandler]:
+def get_handler_impl() -> type[GenericProtocolHandler]:
     """
     Get the appropriate GenericProtocolHandler for the current system and config.
 
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 7ad17560..fba501f3 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -13,7 +13,7 @@ flake8-json==24.4.0
 flake8-noqa==1.4.0
 flake8-use-fstring==1.4
 
-mypy==1.18.2
+mypy==1.19.0
 pep8-naming==0.15.1
 safety==3.7.0
 types-requests==2.32.4.20250913
@@ -23,7 +23,7 @@ types-setuptools==80.9.0.20250822
 autopep8==2.3.2
 
 # Git pre-commit checking
-pre-commit==4.4.0
+pre-commit==4.5.0
 
 # HTML changelogs
 mistune==3.1.4
@@ -33,9 +33,9 @@ mistune==3.1.4
 py2exe==0.14.0.0; sys_platform == 'win32'
 
 # Testing
-pytest==9.0.0
+pytest==9.0.1
 pytest-cov==7.0.0  # Pytest code coverage support
-coverage[toml]==7.11.2 # pytest-cov dep. This is here to ensure that it includes TOML support for pyproject.toml configs
+coverage[toml]==7.12.0 # pytest-cov dep. This is here to ensure that it includes TOML support for pyproject.toml configs
 coverage-conditional-plugin==0.9.0
 
 
diff --git a/scripts/find_localised_strings.py b/scripts/find_localised_strings.py
index 19a5efb6..02f928e3 100644
--- a/scripts/find_localised_strings.py
+++ b/scripts/find_localised_strings.py
@@ -188,7 +188,7 @@ class FileLocation:
     line_end_col: int | None
 
     @staticmethod
-    def from_call(path: pathlib.Path, c: ast.Call) -> "FileLocation":
+    def from_call(path: pathlib.Path, c: ast.Call) -> FileLocation:
         """
         Create a FileLocation from a Call and Path.
 
diff --git a/stats.py b/stats.py
index c16ec880..67fc9379 100644
--- a/stats.py
+++ b/stats.py
@@ -12,7 +12,8 @@ import json
 import sys
 import tkinter as tk
 from tkinter import ttk
-from typing import Any, AnyStr, Callable, NamedTuple, Sequence, cast
+from typing import Any, AnyStr, NamedTuple, cast
+from collections.abc import Callable, Sequence
 import companion
 import EDMCLogging
 import myNotebook as nb  # noqa: N813
diff --git a/td.py b/td.py
index 484e8d29..a5f0d6cd 100644
--- a/td.py
+++ b/td.py
@@ -30,18 +30,18 @@ def export(data: CAPIData) -> None:
     # required
     with open(data_path / data_filename, 'wb') as h:
         # Format described here: https://github.com/eyeonus/Trade-Dangerous/wiki/Price-Data
-        h.write('#! trade.py import -\n'.encode('utf-8'))
+        h.write(b'#! trade.py import -\n')
         this_platform = system()
         cmdr_name = data['commander']['name'].strip()
         h.write(
-            f'# Created by {applongname} {appversion()} on {this_platform} for Cmdr {cmdr_name}.\n'.encode('utf-8')
+            f'# Created by {applongname} {appversion()} on {this_platform} for Cmdr {cmdr_name}.\n'.encode()
         )
         h.write(
-            '#\n#    <item name>             <sellCR> <buyCR>   <demand>   <stock>  <timestamp>\n\n'.encode('utf-8')
+            b'#\n#    <item name>             <sellCR> <buyCR>   <demand>   <stock>  <timestamp>\n\n'
         )
         system_name = data['lastSystem']['name'].strip()
         starport_name = data['lastStarport']['name'].strip()
-        h.write(f'@ {system_name}/{starport_name}\n'.encode('utf-8'))
+        h.write(f'@ {system_name}/{starport_name}\n'.encode())
 
         # sort commodities by category
         by_category = defaultdict(list)
@@ -50,7 +50,7 @@ def export(data: CAPIData) -> None:
 
         timestamp = time.strftime('%Y-%m-%d %H:%M:%S', time.strptime(data['timestamp'], '%Y-%m-%dT%H:%M:%SZ'))
         for category in sorted(by_category):
-            h.write(f'   + {format(category)}\n'.encode('utf-8'))
+            h.write(f'   + {format(category)}\n'.encode())
             # corrections to commodity names can change the sort order
             for commodity in sorted(by_category[category], key=itemgetter('name')):
                 h.write(
@@ -61,5 +61,5 @@ def export(data: CAPIData) -> None:
                     f"{demandbracketmap[commodity['demandBracket']]:1}"
                     f" {int(commodity['stock']) if commodity['stockBracket'] else '':8}"
                     f"{stockbracketmap[commodity['stockBracket']]:1}"
-                    f"  {timestamp}\n".encode('utf-8')
+                    f"  {timestamp}\n".encode()
                 )
diff --git a/tests/journal_lock.py/test_journal_lock.py b/tests/journal_lock.py/test_journal_lock.py
index 649140c8..438d1dd5 100644
--- a/tests/journal_lock.py/test_journal_lock.py
+++ b/tests/journal_lock.py/test_journal_lock.py
@@ -5,7 +5,7 @@ import multiprocessing as mp
 import os
 import pathlib
 import sys
-from typing import Generator
+from collections.abc import Generator
 import pytest
 from pytest import MonkeyPatch, TempdirFactory, TempPathFactory
 from config import config
diff --git a/theme.py b/theme.py
index 20ffe51f..fe431ebb 100644
--- a/theme.py
+++ b/theme.py
@@ -15,7 +15,7 @@ import sys
 import tkinter as tk
 from tkinter import font as tk_font
 from tkinter import ttk
-from typing import Callable
+from collections.abc import Callable
 from l10n import translations as tr
 from config import config
 from EDMCLogging import get_main_logger
@@ -208,7 +208,7 @@ class _Theme:
 
         if isinstance(widget, (tk.Frame, ttk.Frame)):
             for child in widget.winfo_children():
-                self.register(child)
+                self.register(child)  # type: ignore
 
     def register_alternate(self, pair: tuple, gridopts: dict) -> None:
         self.widgets_pair.append((pair, gridopts))
@@ -313,7 +313,7 @@ class _Theme:
         self._update_widget(widget)
         if isinstance(widget, (tk.Frame, ttk.Frame)):
             for child in widget.winfo_children():
-                self._update_widget(child)
+                self._update_widget(child)  # type: ignore
 
     # Apply current theme to a single widget
     def _update_widget(self, widget: tk.Widget | tk.BitmapImage) -> None:  # noqa: CCR001, C901
diff --git a/util_ships.py b/util_ships.py
index 8abbe20f..4f99e731 100644
--- a/util_ships.py
+++ b/util_ships.py
@@ -6,6 +6,7 @@ Licensed under the GNU General Public License.
 See LICENSE file.
 """
 import os
+import sys
 from pathlib import Path
 from edmc_data import ship_name_map
 
@@ -18,7 +19,7 @@ def ship_file_name(ship_name: str, ship_type: str) -> str:
     name = Path(name).with_suffix("").name
 
     # Check if the name is a reserved filename
-    if os.path.isreserved(name):
+    if sys.platform == 'win32' and os.path.isreserved(name):
         name += "_"
 
     return name.translate(