I have spent over two weeks building a world, and after closing the game and opening it up again, the world was GONE!!! It is the second time this has happened! This sucks because i put a lot of my time and dedication into this, and it just disappears!!! i am infuriated!! Please please please PLEASE tell me i can get the world back, and how to prevent this from happening! I don't want to live with 2 weeks of my life wasted!