Sorry if this is in the wrong section but - I think a world deleted itself and it's gone. I have tried the previous version thing but my history doesn't go back that far. How can I make it go back farther or how can I get it back?
If its deleted, and its not in file history, then its probably gone. There is no way to get a world back once it was deleted, unless it was backed up somewhere.
Get back old world?