I am experiencing trouble with the ATR 72-600 also. I can create a flightplan thru the integrated system and the aircraft follows the path; However, when i land and taxi to the gate. I am unable to shut the aircraft down either manually or using the overhead panel to locate battery, which shows to be off and mouse click not able to move it…either on or off… The panel on the pilots left side, where you choose Aircraft, Performance, Flightplan etc…will NOT function with click of mouse after showing up at a gate. “My passengers stuck on the plane” ! 
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