With SU7.1 the aircraft "crashes" when I open the little side window in flight. If I am quick enough "between crashes" and click to close the hatch all works fine. Small bug but thought it was worth posting.
Its an MSFS thing, so far as I understand - the sim interprets an open window or door as a crash (I suppose its thinking pressurized fuselage?) which is why Black Square recommends that "Disable Aircraft Stress Damage" should be enabled.