diff --git a/appcast.xml b/appcast.xml
index fcfc899f..4ae39a9d 100644
--- a/appcast.xml
+++ b/appcast.xml
@@ -4,40 +4,48 @@
 		<title>Irony Mod Manager</title>
 		<language>en</language>
 		<item>
-			<title>1.26.64-alpha</title>
+			<title>1.26.77-alpha</title>
 			<description>## Release Notes 1.26
 * Update dependencies
 * Bump to net8 which should grant some performance improvements (win7 might not work going forward)
-* Remove ripple animation from Material themes (per #484)</description>
-			<pubDate>Sat, 10 Feb 2024 05:01:21 +01:00</pubDate>
-			<enclosure url="https://github.com/bcssov/IronyModManager/releases/download/v1.26.64-alpha/linux-x64.zip" sparkle:version="1.26.64.54333" sparkle:shortVersionString="1.26.64" length="90875951" sparkle:os="linux" type="application/zip" sparkle:signature="IunvyCthzX72HEsFu0grxJRpCxNwLuH9B8xL7nJRenVEMvC694/l7gLE9YsrtlWyW5dVZTJcMj81dBoD7pAUBA=="/>
+* Remove ripple animation from Material themes (per #484)
+* Irony is now single instance app
+* Disable OSX update installation (online check only now)</description>
+			<pubDate>Wed, 14 Feb 2024 16:07:15 +01:00</pubDate>
+			<enclosure url="https://github.com/bcssov/IronyModManager/releases/download/v1.26.77-alpha/linux-x64.zip" sparkle:version="1.26.77.43406" sparkle:shortVersionString="1.26.77" length="90758434" sparkle:os="linux" type="application/zip" sparkle:signature="YSRvt0gtUjuyixHtYbLA+ElU9BBeoRcmu+HaMPXntuGkRwDLwNS+xEm+/vuXAdsxHnFz4XLXDxbHETRXwRGsCg=="/>
 		</item>
 		<item>
-			<title>1.26.64-alpha</title>
+			<title>1.26.77-alpha</title>
 			<description>## Release Notes 1.26
 * Update dependencies
 * Bump to net8 which should grant some performance improvements (win7 might not work going forward)
-* Remove ripple animation from Material themes (per #484)</description>
-			<pubDate>Sat, 10 Feb 2024 05:01:27 +01:00</pubDate>
-			<enclosure url="https://github.com/bcssov/IronyModManager/releases/download/v1.26.64-alpha/osx-x64.zip" sparkle:version="1.26.64.54333" sparkle:shortVersionString="1.26.64" length="93813887" sparkle:os="osx" type="application/zip" sparkle:signature="lJ5H41CgFaI1XtQ6VcOTdXuZXNAcmNNPchIwZsDo5lIFxlkaXMnHiNrnJdyf9I8uMtgMrPGd74KgQSfwKNqfDw=="/>
+* Remove ripple animation from Material themes (per #484)
+* Irony is now single instance app
+* Disable OSX update installation (online check only now)</description>
+			<pubDate>Wed, 14 Feb 2024 16:07:22 +01:00</pubDate>
+			<enclosure url="https://github.com/bcssov/IronyModManager/releases/download/v1.26.77-alpha/osx-x64.zip" sparkle:version="1.26.77.43406" sparkle:shortVersionString="1.26.77" length="93718992" sparkle:os="osx" type="application/zip" sparkle:signature="35mAvfNOU0S+tfM/CXyR+5tuo2UC0QeqRJW2UNIyLL8l43g2uEgHX8ESg4MYFrYzu5S7RBqdEXkLChsNkQSvDw=="/>
 		</item>
 		<item>
-			<title>1.26.64-alpha</title>
+			<title>1.26.77-alpha</title>
 			<description>## Release Notes 1.26
 * Update dependencies
 * Bump to net8 which should grant some performance improvements (win7 might not work going forward)
-* Remove ripple animation from Material themes (per #484)</description>
-			<pubDate>Sat, 10 Feb 2024 05:01:33 +01:00</pubDate>
-			<enclosure url="https://github.com/bcssov/IronyModManager/releases/download/v1.26.64-alpha/win-x64-setup.zip" sparkle:version="1.26.64.54333" sparkle:shortVersionString="1.26.64" length="72402055" sparkle:os="windows" type="application/zip" sparkle:signature="xGiIVjTiIaARtMD3S8RjgtfBGpH8MvGkPEXJHB3OzVf+VjapH3JPBJvl7uMITo8mmYFjmIHzYTuaRsEcljOPDg=="/>
+* Remove ripple animation from Material themes (per #484)
+* Irony is now single instance app
+* Disable OSX update installation (online check only now)</description>
+			<pubDate>Wed, 14 Feb 2024 16:07:29 +01:00</pubDate>
+			<enclosure url="https://github.com/bcssov/IronyModManager/releases/download/v1.26.77-alpha/win-x64-setup.zip" sparkle:version="1.26.77.43406" sparkle:shortVersionString="1.26.77" length="72379794" sparkle:os="windows" type="application/zip" sparkle:signature="A/PAlNv4DgrUU/yD8uQR2xyyDCy4WVBt7HdbakjuJwC2CK72oBAG5f331cNc17TwCoux/Yc0i95KzXCf19pZAw=="/>
 		</item>
 		<item>
-			<title>1.26.64-alpha</title>
+			<title>1.26.77-alpha</title>
 			<description>## Release Notes 1.26
 * Update dependencies
 * Bump to net8 which should grant some performance improvements (win7 might not work going forward)
-* Remove ripple animation from Material themes (per #484)</description>
-			<pubDate>Sat, 10 Feb 2024 05:01:33 +01:00</pubDate>
-			<enclosure url="https://github.com/bcssov/IronyModManager/releases/download/v1.26.64-alpha/win-x64.zip" sparkle:version="1.26.64.54333" sparkle:shortVersionString="1.26.64" length="106358949" sparkle:os="windows" type="application/zip" sparkle:signature="EB+Px8v9R0a2GwVYUrPvZwDpLZRxZVilgmErBtd1gPUtp9y92GpXLcpGuJouJGDPAeEkjTL94eVMMzZhrKIoCw=="/>
+* Remove ripple animation from Material themes (per #484)
+* Irony is now single instance app
+* Disable OSX update installation (online check only now)</description>
+			<pubDate>Wed, 14 Feb 2024 16:07:29 +01:00</pubDate>
+			<enclosure url="https://github.com/bcssov/IronyModManager/releases/download/v1.26.77-alpha/win-x64.zip" sparkle:version="1.26.77.43406" sparkle:shortVersionString="1.26.77" length="106314407" sparkle:os="windows" type="application/zip" sparkle:signature="SCKhMEYIQ9HUlFZobm+2JOLRYpXu5mwrLzl3HDuJdW0zGlWgTv4LTfsG2LBDYr1+L4oRak4LpueZsYr2/AhVBA=="/>
 		</item>
 		<item>
 			<title>1.25.161</title>