This was explained many times already, but I'll say it again:
JETWAY are not handled by the Addon Manager AT ALL! In fact, if you *remove* both the Addon Manager and the Couatl programs, so you are sure they wont' run, the ONLY thing left in the scenery, will be exactly the jetways.
So please, don't waste your time trying to fix a disappearing jetways problem, by reinstalling anything related to the Addon Manager, because you are *really* just wasting your time for something that is not even remotely connected to that.
The ONLY thing that can cause a jetway to disappear is another .BGL that has explicitly excluded it, which can be:
- Another AFCAD in conflict for the same airport, but that's usually manifests with default buildings showing through as well.
- A problem with the AES installation, this is more likely the case if you are missing JUST the jetways, but everything else is looking normal.