I was playing CK2 until it crashed. Odd, I thought. I went back on to play again, and when I selected my save file, all the nations were gone, and every province had no character. It was as if the whole save was erased. However, it was still present in the folder where saves are stored. I then started a new game, saved it, resigned, and loaded it. That game was the only file I could play. Is there anything I can do so that I won't lose all my save progress?