Troubleshooting: Detail new rotated DEBUG log files.

Troubleshooting.md

@@ -226,17 +226,30 @@ If your configuration has been corrupted, or badly set, such that you can't run
 
 --
 # Reporting a problem
-Please report a problem as a new GitHub [issue](https://github.com/EDCD/EDMarketConnector/issues/new?assignees=&labels=bug%2C+unconfirmed&template=bug_report.md&title=)
-. Please wait for the error to occur and zip up and attach this app's log file to the new issue:
+Please report a problem as a new GitHub [issue](https://github.com/EDCD/EDMarketConnector/issues/new?assignees=&labels=bug%2C+unconfirmed&template=bug_report.md&title=).
+.
 
-Mac:
+## 4.1.0 and later (including betas)
+If you are using 4.1.0, or later (including betas of 4.1.0) then there is a new
+set of rotated logfiles in the location:
 
-* `$TMPDIR/EDMarketConnector.log`
+* Windows: `%TMP%\EDMarketConnector\EDMarketConnector.log`
+* Mac: `$TMPDIR/EDMarketConnector/EDMarketConnector.log`
+* Linux: `$TMPDIR/EDMarketConnector/EDMarketConnector.log`
 
-Windows:
+These are *not* truncated on a new run, so there will be no need to re-create
+the bug.  They are, however, rotated (to `EDMarketConnector.log.1` and onwards)
+if they reach 1 MiB in size.  So check timestamps and contents to be sure you
+upload the correct file!
 
-* `%TMP%\EDMarketConnector.log`
+These files also *always* contain DEBUG output,
+whereas the file detailed below only contains raw `print()` output and anything
+logged at the level you have configured.
 
-**NB: This file is truncated (overwritten from the start) each time you
-run the appication.  So if you encounter an error make a copy of this
-file *immediately*.**
+## Pre-4.1.0
+Prior to EDMC 4.1.0 the only logfile is re-created on each run of the program.
+As such you will need to re-create the issue and then make a copy of the file:
+
+* Windows: `%TMP%\EDMarketConnector.log`
+* Mac: `$TMPDIR/EDMarketConnector.log`
+* Linux: `$TMPDIR/EDMarketConnector.log`