I tried to reinstall the scenery, reinstall the addon manager, tried to update the scenery, but nothing helped.
Of course nothing helped by reinstalling the scenery or the addon manager, since the problem is nothing that has anything to do with the scenery or the addon manager!
2) AES won't work around the airport, though it is activated.
This, instead, is the problem. We can't possibly know *why* AES is not working (you should check their support for this), but since it's not working, it has managed to remove the jetways that comes with the Geneva, which always work, since it's done by a simple exclude .BGL supplied by AES, but it failed to replace them with its own, which is why you don't see any jetways.
- You don't see the jetways that comes with the scenery, since AES excluded them
AND
- You don't see the jetways provided by AES, since AES is not working (whatever the reason is).
Of course, I would like to remind you the scenery comes already with its own animated jetways, and GSX is totally free to use at all our airports for the rest of the services, so maybe you might want to spend your AES credits on other airports.