Hi! Sorry that you've been experiencing issues. So, it sounds like a few things went wrong: Firstly, the game hanging error happens when your computer can't keep up with the game, but it can sometimes freeze your save file afterwards. This can usually be cleared by another machine opening the save file and re-saving it. However, it then sounds like you accidentally tried to open an E13 save in E11, which, as you might imagine, won't always work because things that exist in E13 don't in E11. I am a little bit surprised that it would have corrupted the save file even when loading back into 13, but that can happen. So, for what to do, I would say make sure you're updated to the latest version, firstly. Then, make sure that, running that latest version, you can indeed still not open your save file. If you can't, you can try sending it to someone, or myself, to see if it'll work on a different computer (I would be surprised if that was the case, but it may clarify some issues). However, generally if a save file cannot be opened, there's not much I can do. Sorry.