Now, all my parking spots in GSX Pro report that they are isolated. I spent a couple of days creating the profile, and I would hate to have to re-create it from scratch, especially as I was set to deliver my RTM version of the scenery to my testing team today.
The issue is, the airport profile doesn't have ANY information about the parking connections, which of course you can clearly see by looking at the .INI file directly: there's nothing there about the taxiway paths and their connection to the parking spots.
The only thing that tells GSX how each parking is connected to the taxiways, is data coming from Simconnect through the Navdata API, that's why I don't think your profile has a problem, but for some reason different data is coming from the sim to GSX since the last time the profile worked, suggesting a scenery conflict.
Are you sure you never seen a message from GSX in the scenery customization page telling you that some (or even all) parking spot didn't match ?
This is normal if the scenery configuration in the sim (again, what GSX is getting from Simconnect, we don't know anymore which from which .BGL/BGLs this data is coming from) has changed, so different parking spots are coming from Simconnect compared to what we had in the profile, suggesting you either have a scenery conflict, or you are just using a different scenery. This might happen if your scenery was disabled at some point, then you enabled again. Common case when testing. But when you saw that message, GSX would have asked to create a new profile from scratch, or save a new one with just the matching parking spots, so you could continue customizing the "new" scenery.
To make it even clearer: GSX has no way to know if you just installed a new scenery, or you reverted to a default one, or you have a conflict. From its point of view, they are basically the same situation: the list of parking spots coming from Simconnect doesn't match the one in the active profile. The only difference is a slightly different message if SOME parking spots are not matching (so you are offered a choice to save a new file with the matching ones only), or NO parking spots matches, so the only choice is to create a new profile.