All right, if the Addon Manager is there, and says the scenery is active, than you don't need to worry about anything related to registration or activation or antivirus, or software that doesn't run.
This looks more like a simple scenery install issue.
- Have you noticed any kind of error message when installing it ? There are cases when, if the scenery.cfg was *already* corrupted with a syntax error, either due to hand-editing, or to a fault installer coming from another scenery, our installer can't finish copying all files and add the scenery to the library. The installer has already a lot of built-in checks against corrupted scenery.cfg (note: a corrupted scenery.cfg will not create any problem in FS, it's just that the affected area might not display), but it's impossible to check for anything.
If you go to the Scenery Library and don't see any entry for Chicago, then this is the case. If you had errors during install, the best solution is to first fix the scenery.cfg, then reinstall the scenery.
- If you have an entry for KORD, check you don't have a *double* entry for it. This might happen if the user manually edits the scenery.cfg changing the name of the area: this might confuse the uninstaller, and could result in a double entry when reinstalling. Double entries for the same area will make the scenery disappear.
- If it's not anything related to the scenery library, it might be you have reinstalled FS9 and forgot to apply 9.1 update. We haven't tested it, but I'm sure nothing will probably work on 9.0, the scenery will simply not show.