2017.1.3 Windows 10, AMD-8
Laptop was connected to TV using HDMI.
Laptop screen displayed normally on TV
When ran FlightGear, Start menu displayed normally on TV
However, when clicked on "run", program failed to display on TV; even though it continued to display normally on laptop.
Application was not minimized on laptop; however, for some strange reason, TV display showed it was minimized.
Don't recall this happening when last tried using HDMI with a previous version of FlightGear.
Will try again after updating laptop to 2017.2.1