In any case, for future reference, GSX will read the aircraft configuration from all these sources, in order of priority:
1) If there's no configuration data at all, it will read from Simconnect and the aircraft.cfg. This is not ideal, since doors positions won't be very accurate, but it's a start to create a custom config.
2) If there's an old intelliscene.cfg file made for AES by the airplane developers, it be will be used by preference over #1
3) If the airplane is internally supported by GSX, the internal configuration will be used by preference over #2
4) If the airplane comes with a GSX.CFG file, in its own folder ( the one that contains the aircraft.cfg file too ), which is usually supplied by the airplane developer, it be will be used by preference over #3
5) If the airplane has a GSX.CFG file in %APPDATA%\GSX\Airplanes, which is usually created when you edit the airplane with the GSX airplane configuration page, it be will be used by preference over #4
The GSX airplane configuration page will indicate from which source GSX is reading its data from.