If you want to restore your Minecraft installation to a previous version, you need the original minecraft.jar file (of the version you like to roll back to) which was downloaded by the Launcher.īest way to get the minecraft.jar backup fully legal is just to create it by your own right after you downloaded the latest version: This can also be used to get a fresh Minecraft installation (it will keep your saves and texture packs, but not your mods.). Finally, click 'Done' and login with your Minecraft credentials. Click 'Options' next to the username textbox, then 'Force update!' on the 'Launcher Options' window. To update Minecraft, start the Minecraft Launcher. 2.1 Creating backups of the minecraft.jar.