Sir,
Thanks for that, but I do not have any other mods for the CLT. I actually did a re-write of the latest version of the CLT installer, and the issue remains the same. While every other ini file is written here %APPDATA%\Virtuali\GSX\, the CLT is written here D:\Program Files\Addon Manager\Fsdreamteam\KCLT\scenery
So The other two links you sent did not assist me as I will still having the issue..
However, after doing a reinstall to over-write and the work-around you have here
http://www.fsdreamteam.com/forum/index.php/topic,20048.0.html, I was able to use the airport again.
Thank you.