While I think about it...
There's been a few times it's "save is from too far back a version, have to restart". That shouldn't be an issue for me (think this one is from 48) but how long before people will have to restart again because you did something that causes it to not work right?
Edit to add something: how do I delete a save? I messed up, and accidentally saved when I shouldn't have. I thought it was in appdata somewhere but now I'm not so sure (I'm on a Windows computer).