I have a survival game that I have been playing for over a year. I've spent a lot of time on it. Today, when I opened the game, it appeared to be gone. I looked all over for it, and found that there was a game all the way at the bottom with no name. I opened it, and it was my world. The name had been deleted somehow, it had been changed from survival to creative, and all of my chests were empty. Any chance of getting everything back to the way it was?