Hmmm were you trying to use the control mapping popup? During a game (Pause -> Options -> Controls), or from the Main Menu -> More -> Options -> Controls?
If after changing some settings the game keeps crashing you can always delete your moonbase_settings.json preference file to have it reset.
Yeh i have the same problem on mac. Every Time i try to change the controls through the main menu the game crashs. But if i change it after lunching the game it's working.
