If you have an FSDT Exclude file in the XML format ( which is supposed to be placed in the Addon Manager\FsDreamTeam\Exclude folder ), you MUST start the GSX Control Panel, which will compile that XML file into a .BGL file, which is the only thing the simulator knows and will use to Exclude default jetways on any scenery.
The GSX Control Panel will recognize you have an .XML that has never been compiled before ( because you don't have the associated .BGL ), so it will prompt you to Compile it. This will result in a .BGL file placed in the Addon Manager\FsDreamTeam\Exclude\SCENERY, which is what the simulator will use.