I got a crash of the application in a siege menu.
After several siege as I didn't understand as it goes, I decided to activate the IA (check the brain box at the bottom left of the window).
Then I got a crash, I admit I don't know if I pushed an other button (Engage !) after the activation of the "brain".
I'm using the demo version of the game.
I attach the screen copy and a copy of the configuration of my game.