As clearly explained in the GSX Manual, Page 7, whenever you install a new scenery AFTER GSX, you MUST go back to the FSDT Installer, enter the Config page and click the
Exclude 3rd party button to disable GSX replacement jetways for any 3rd party airports.
I'll quote the relevant part of the manual, under the IMPORTANT heading:
IMPORTANT
The Configuration of 3rd Party Exclusion from Jetway replacement is done when doing any of the following:
• When you first Install or Reinstall GSX
• When you perform a GSX Update
• If you Install/Reinstall/Unlink/Relink any FSDT airport
If you install a new 3rd party scenery, just installing it won’t result to automatically go here and reconfigure Jetway Exclusion, you should develop a habit to always check the GSX Config page after installing a new 3rd party scenery. Failing to do so, would result in Parking conflicts (visible as double Parking spots in the World Map), and Jetways malfunctions.
SUGGESTION
If you never use default airports and you always have a 3rd party add-on for any airport you fly into, you might consider Disabling ALL GSX Jetway replacement files at once, by clicking the >>> button on the Enabled side, so they will all go on the Disabled side, and eventually Enable an airport, for that time you want to use the default scenery.
