All right,
It's not an Addon Manager problem, then. It runs properly. The scenery that simply disappear might due to one of these things:
- A double entry for Zurich in the SCENERY.CFG file. A double entry surely will make the scenery disappear.
- A missing BGL. Have you tried to simply reinstall it, without uninstalling first ?
However, I need you to be more precise about what you meant, by saying "I only get the trial version". Does it disappear after some minutes, like the Trial, or it simply doesn't show up right from the start ? In this case, did it work before, when it was in Trial ?