Seems like you don’t, actually 
You’re in the Official\OneStore folder. You need to be in the %LOCALAPPDATA%\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache\SimObjects\Airplanes\ folder (assuming you have the Store version)
Seems like you don’t, actually
You’re in the Official\OneStore folder. You need to be in the %LOCALAPPDATA%\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache\SimObjects\Airplanes\ folder (assuming you have the Store version)