So i've been working on a project with a bunch of maps for a few weeks now, and everything was going fine until yesterday. I went to show my friend the map in GM mode and i had to update the game first. it all worked fine and i showed him the maps and all that jazz. However afterwards when it came to using the editor again it crashes after about 30 seconds every time no matter what i do, it says something about wrong serializer, and a whole bunch of other errors that i cant actually read because it crashes too fast. Could anyone help? i really don't want to lose all my maps. I spent way too much time and effort on them.