If it helps narrow the cause of the problem down I don't see that in FSX:SE with either the v 1.2.0 700 or 900.  The battery switch moves and the appropriate systems come to life.   I do see a possible issue with Dave in that the first click on a different aircraft state brings up the "Aircraft Configuration Complete" message at the top of the screen but the configuration doesn't change even after waiting several minutes.  Clicking the same state icon a second time does however get it