I was trying to get optifine to work with forge without crashing, and I pulled optifine out of my mods folder. When I went back into the game, my world no longer showed up as an option even though it still shows up in the saves folder. I have completely reset the version and yet it still will not show it, though it still shows my other world.
Why won't my minecraft world show up?
Nick Capesius
It's may be a bug. Use Report/Feedback option to report it to the developers.
CYERON