I have had FlyTampa's St. Maarten on my machine for quite some time now. Well I went to go fly out of there earlier and poof it was ALL gone. The AI are parked there like there is a gate but there is no building, taxiways, runway, NOTHING! I checked my directory and saw that it was still installed. So I tried uninstalling and reinstalling. Nothing. I did this multiple times to try and fix it. Nothing is working for me here. I know nothing about how to post a screenshot so I am not even going to try. But I really need some advice here.

Is it activated in the scenery library?

Can you check if it by accident appears two times in your scenery library. Had this happen to me too. FlyTampa's St. Maarten will activate itself after installing and sometimes it shows up twice thus cancelling itself out.

If it does, uninstall the scenery using the uninstaller. Go to your FS folder and delete every Scenery.*** you find except Scenery.cfg (.bak, .txt, some will show as OldScenery.cfg and so on). Empty your trash can, restart your pc. Re-install St. Maarten and DO NOT allow it to self activate (you'll get the option). Activate it in your Scenery library and check again if it shows up only 1 time.

Crash

PS. If it still shows up two times (could happen after a few restarts of FS) open your Scenery.cfg in wordpad and delete the second entry of St. Maarten. But try the first option first.