"fsdreamteam-gsx-world-of-jetways" is in there as a regular folder (I suppose this is right?).
No, of course this is wrong, and it's exactly the cause of the problem! Not just that problem: if the link became a real folder a while ago, it might outdated, causing all sort of malfunctions, because our updater is updating the package in the \Addon Manager folder (which is supposed to be linked to the Community), but if the folder is not a link, the simulator is using what is likely an outdated version because it's not a link anymore.
We install ALL GSX packages as a Symbolic links, if one of them became a real folder, it might have happened when restoring the Community from a backup because, unless you know exactly how your backup software deal with links on restoring, you can't be sure it won't translate a link into a real folder, since backup software usually have options to tell how links should be handled on backup and restore.
That's assuming you used a backup software. If you just used Windows Explorer Copy/Paste functions to restore a folder, it will translate a link into a real folder.
So yes, as I've said in my previous post, the solution is to REMOVE the links for the GSX Packages (ALL of them!) in the Community folder, start the FSDT Installer and click RELINK, so it will create them correctly as they are when installing normally.