I got the Minecraft Beta and joined it. But when I followed the steps to get out of that version, It said to uninstall and reinstall, so I did. When I opened Minecraft after, all my worlds were deleted, so I searched up how to get them back. It said go to %appdata% and .minecraft, right click on the saves folder, and  click restore previous versions. So I did that up to the step where I am supposed to find the saves folder. The only folder I saw was resource packs. Please help.