Yeah I tried that, didn't only thing that seems to work is removing the save files I had, I guess one of them got corrupted?
That's very likely. Try figuring out which savefile is broken: move half of the files out of the folder, check ingame. If nothing is broken, add half of the removed files until you come across the broken file.
The save data itself shouldn't be broken, since RPGmaker only accesses the file header when selecting a save (for information like playtime, character sprite, current location, ...). But fixing that file would probably take a lot more time than replaying the game from an earlier save.