I have downloaded Zurich as a trial version, and installed accordingly.
When I started FSX, the normal messages appeared, (do you want to run addonmanager.dll...etc.)
When I looked in the scenery directory, all was there.
After saying yes to all, I started a flight in Zurich, where AI planes, trucks, and jetways appeared, but no
buildings or ground textures. The addon manager did not show either. I am currently running FSX with SP1.
If I need to provide more info, please let me know. Thanks!