Please confirm which NY City X version was indicated by the installer?
Please try to post the screenshot from a day, not from a night. However our scenery should look the same / similarly as on the product page:
http://www.drzewiecki-design.net/prodNYCity_X.htm (of course depending on the sim settings). Can you share the screenshot of your sim settings?
There is a "little" mess in your scenery.cfg - missing some areas, different layers and large number of addons (which may cause OOMs too). For me it's worth to rebuild it, however can you show how it looks in your Scenery Library in FSX? Have you tried to add this scenery to the Scenery Library manually? (on the top)
There is also a chance that one of the default FS areas are deactivated in your Scenery library. Some default objects may be used indeed, but this requires all default files to be active. The other case would be of another scenery is higher in the Scenery Library list and it is excluding some our areas. Do you have any other addons for this area?
You may also check if it looks different without New York Airports v2 X DEMO and at the end I can also suggest allow FSX to rebuild fsx.cfg to see if there is any difference (please keep the old one to be able to return to it).