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I get tired of renaming/copying/backing up various JARs when trying out snapshots. I haven't been able to find anything to help me bypass this renaming issue. Can I get Minecraft to launch different JARs?

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up vote 6 down vote accepted

I use MultiMC, it works on Windows, OSX and Linux and allows you to run many instances of Minecraft from a single launcher.

It even allows you to automatically install mods to individual instances and have different save files for different versions.

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Ooh, that's interesting. For now MagicLauncher works fine for me, but I may check that out. – Rev Aug 27 '12 at 22:52

Nevermind, apparently Magic Launcher can do this!

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