I have also experienced the 4 Player Bug on every game I have started. If I do not limit the group to 3 players, the game crashes and closes immediately when a 4th player is in the group. So far enjoying the editor. Some of the bugs require work around like the Armor and Skill bugs that cause them to revert after you load a game. I also encountered one of my Monsters leveling up to 12 when I had set him to 5 in the editor before opening the game. Was quite shocking to see him hit something for hundreds of points of damage against level ones!
Thank you for creating this, with a bit of polish and some more options this could be a go to game for quite some time.
Game Master X