>> Turn the Steam Overlay OFF << Steam>Settings>In-Game .. Top check box
The game has been marginally stable for me, perhaps i should say mostly stable as i can get long runs (time&turns) without a crash but i do still see CTD's and at times several in just a few turns.
I turned Steam Overlay OFF and have played for a couple of days now crash free. I just turned it back on and crashed within 10 turns.
Whit the randomness i was experiencing it may be a bit early to come to this conclusion but i wanted to get it out to see if it helped others