So, I have been creating a world for the past 2 or so days, and I log on today to find my world completely gone when looking to join it (always been a 1.7.1 world, NO LAN involved) and I can't find it. I then look into the saves files and it is there, I even made a zip file, deleted the original folder, opened the zip file into a folder, and I still can't see the world as an option to join. I have no idea to why this is even happening to me in the first place.