Has this ever happened to you? " I UPDATED MINECRAFT AND I CANT GO ON EMC!" "I WANT TO PLAY VERSIONS OF MINECRAFT THAT I DIDN'T JOIN IN TIME FOR!" Well look no further! With the Minecraft Version Changer, you can solve BOTH OF THESE PROBLEMS!Basically, this program allows you to downgrade/upgrade your JAR file in a simple click.http://www.minecraftforum.net/topic/877629-minecraft-version-changer-windows│mac│linux-300k-downloads-indev-145/This is NOT a mod, so you will not have to re-download it once a new venison of Minecraft comes out.*Minor Bug* If you downgrade to a version that uses a different lighting system, like Indev, and then then upgrade to 1.4.5, the lighting system won't change.