Hello there. Have anyone else this problem, or that only me just have that one. I'm kinda stuck, and can't open mostly all of the savings after new update ^^"
Your save files are from too many versions back and isn't compatible anymore. Since you're on windows though, you can navigate to the folder with the missing file, and put a dummy file in there to trick the game into thinking everything's fine. Then just save your game and it should work.