diff --git a/edmarketconnector-beta.xml b/edmarketconnector-beta.xml
index 9d6619bc..627e7815 100644
--- a/edmarketconnector-beta.xml
+++ b/edmarketconnector-beta.xml
@@ -6,10 +6,34 @@
       <description>Most recent changes with links to updates.</description>
       <!-- Windows -->
       <item>
-         <title>Pre-Release 5.12.1-rc2</title>
+         <title>Pre-Release 5.12.1-rc4</title>
          <description><![CDATA[<style>body { font-family:"Segoe UI","Tahoma"; font-size: 75%; } h2 { font-family:"Segoe UI","Tahoma"; font-size: 105%; }</style>
 <p>We now test against, and package with, Python 3.11.9.</p>
 <p><strong>As a result, we do not support Windows 7, 8, or 8.1.</strong><br>
+<h2>Release 5.12.1-rc4</h2>
+<p>This is a release candidate for 5.12.1. It has been pushed to the "Beta" track for updates!</p>
+<p>This release continues to refine fixes for with EDMC authentication.</p>
+<p><strong>Changes and Enhancements</strong></p>
+<ul>
+<li>Fixed a typo in the prior release notes</li>
+</ul>
+<p><strong>Bug Fixes</strong></p>
+<ul>
+<li>Fixed a bug where the EDMC System Profiler wouldn't load details properly</li>
+<li>Reverted a number of usages of Pathlib back to os.path for further validation testing</li>
+<li>Fixed a bug where EDMC would error out with a max() ValueError</li>
+<li>Fixed an issue where the EDMC protocol wouldn't be processed properly via prototyping</li>
+</ul>
+<p><strong>Plugin Developers</strong></p>
+<ul>
+<li>nb.Entry is deprecated, and is slated for removal in 6.0 or later. Please migrate to nb.EntryMenu</li>
+<li>nb.ColoredButton is deprecated, and is slated for removal in 6.0 or later. Please migrate to tk.Button</li>
+<li>Calling internal translations with <code>_()</code> is deprecated, and is slated for removal in 6.0 or later. Please migrate to importing <code>translations</code> and calling <code>translations.translate</code> or <code>translations.tl</code> directly</li>
+<li><code>Translations</code> as the translate system singleton is deprecated, and is slated for removal in 6.0 or later. Please migrate to the <code>translations</code> singleton</li>
+<li><code>help_open_log_folder()</code> is deprecated, and is slated for removal in 6.0 or later. Please migrate to open_folder()</li>
+<li><code>update_feed</code> is deprecated, and is slated for removal in 6.0 or later. Please migrate to <code>get_update_feed()</code>.</li>
+</ul>
+<hr>
 <h2>Pre-Release 5.12.1-rc2</h2>
 <p>This is a release candidate for 5.12.1. It has been pushed to the "Beta" track for updates!</p>
 <p>This release fixes a pair of widely-reported bugs with EDMC authentication.</p>
@@ -2595,7 +2619,7 @@ about this:
 <a href="https://issues.frontierstore.net/issue-detail/28638" rel="nofollow">PTS CAPI saying Commander is Docked after jumping to new system</a>.</p>
 </li>
 </ul>]]></description>
-         <enclosure url="https://github.com/EDCD/EDMarketConnector/releases/download/Release%2F5.12.1-rc2/EDMarketConnector_Installer_5.12.1-rc2.exe" sparkle:os="windows" sparkle:version="5.12.1-rc2" length="0" type="application/x-ms-dos-executable" />
+         <enclosure url="https://github.com/EDCD/EDMarketConnector/releases/download/Release%2F5.12.1-rc4/EDMarketConnector_Installer_5.12.1-rc4.exe" sparkle:os="windows" sparkle:version="5.12.1-rc4" length="0" type="application/x-ms-dos-executable" />
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