I am also facing the same problem when i use the map editor, where if the program crashes, my saved map will revert back to before whatever i had edited. Also, whenever i quit the map editor and go back in again, the program will crash. The river tool in the map editor is also extremely bugged as it doesn't register any changes i made whenever i reload the map to edit.
heres the link to my debug.err
http://drop.io/rdgakln
I hope the bugs get sorted out soon. It's very frustrating to keep editing the same things over and over again. Thank you for your time.