In Windows Search Bar type '%appdata% Click Roaming Top of the list will be '.minecraft' left click that then click on 'bin' Then Right click your 'minecraft' jar file click at the bottom 'properties' then top right in popped up window will be 'Previous Versions' Then Click that and hit Restore. Keep in mind MINECRAFT MUST BE SHUT DOWN! Then just start up minecraft and enjoy the previous versions! (:

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