This is the first official release after ExtremeLauncher v3, unfortunately, old versions of ExtremeLauncher (v2 and v3) started breaking really badly and Java support was not all that great.
We recommend all users update to v4 as soon as possible.
ExtremeLauncher v4 is now fully compatible with Java 16, Java 17, etc. which fixes some of the issues users were experiencing with Minecraft 1.17 and above.
ExtremeLauncher 188.8.131.52 fixes the issues where versions.json would not be downloaded appropriately, causing the launcher to crash.
ExtremeLauncher 184.108.40.206 update was released in order to address some security and performance issues, instead of external libraries ExtremeLauncher now uses native Windows Zip functions, .NET Framework was updated to 4.7.2 as .NET Framework 4.6.1 reached the end of support.
ExtremeLauncher 220.127.116.11 fixes downloading process for older versions of Minecraft.
ExtremeLauncher 18.104.22.168 will attempt to auto-redownload corrupted files from Minecraft servers.
ExtremeLauncher 22.214.171.124, improved internet connectivity detection.
ExtremeLauncher 126.96.36.199, stable release, public.