I have read in the forums about the same problem other people are having but so far it seems I am the only one still having them. Also, I have followed all the instructions on the forums to fix this but still no luck. I even sent a file to your support team but nothing was fixed.
According to your description yes, it seems you are the only one with this problem.
Most people that don't have buildings, they don't have them from the start of the program and the Addon Manager and/or Couatl (or both) are not running for some reasons, which are always invariably external ones and not dependent on any of our products (Antivirus, broken VC++ libraries, broken Simconnect, user not trusting the module, user explicitly distrusted our signature) and they are always fixed by fixing one of these things.
Instead, if you read your explanation correctly, it seems you suddenly have random disappearances while everything seems to work.
I even sent a file to your support team but nothing was fixed.
I haven't received anything from someone with the email you registered on the forum, and haven't received any PM on the forum either so, please allow some way to identify you if you used a different identity, because nothing ever came from you.
I figured that maybe a new release of an airport would fix itself because it was such a big problem that it would have been addressed, but I have bought all of them and the problem is at all of them.
Since you said yourself you know it's a problem only you have, I don't see how we could "fix" it by changing anything in the sceneries, surely now without knowing WHAT caused it on your system (only) first so, AT LEAST, even if we couldn't "fix" it, we could at least know what to say in case someone else ends up in with the same problem.
The only previous evidence of your issue, was some messages you posted on the forum in February 2011, where your last message said the ONLY airport you had this problem was JFK, and ALL other FSDT airports were fine.
http://www.fsdreamteam.com/forum/index.php?topic=4101.msg36776#msg36776yes, so far the only problem I am having is with JFK
After Feb. 2011, you haven't posted anything more about this.