It won’t exclude at KMYR developed by Yhe Airport Guys. I went into their Scenery folder and looked for any “jetway” but there isn’t any. How can I remove default jetways?
As explained in the GSX manual, and in so many threads on this forum, in order for a jetway to be removable, it must be a proper animated CTRL+J jetway, modeled separately and included in the scenery AFCAD, which is the only way to create a default animated jetway.
If the scenery already has SODE jetways, they cannot excluded with this method and, instead, you must act on their XML SODE configuration file. I don't think replacing SODE jetways is worth the effort though.
If the scenery has static jetways, they can replaced with this method ONLY if they are been modeled as independent objects. If they are part of the terminal building, they cannot be excluded with an exclude file and, instead, you must really edit the scenery itself, which is fairly difficult, but CAN be one.