Hi Umberto,
yesterday i took some time to service my FSDT installations, because i noticed something annoying which had happened severall times before, but was to lazy to mention earlier.
Missing Airport at JFKv2!
Deinstalled GSX + KJFKv2 with Addonmanager and couatl, because i've seen newer versions here.
Downloaded the latest installer of kjfkv2 [v2.1] + install
startet FSX/jfk worked again.
then DL the latest GSX [1.8.1]
run fsx, missing airport like shown in the attached picture again
DL the standalone Addonmanager, didn't help to get the airport back.
deinstalled just KJFK again (also AM and couatl) und did another reinstall without reinstall of GSX on top
KJFKv2 workes as it should again.
So i assume there must be some issue between this 2 installers, which prevents KJFK from working proper, when GSX ist installed last.
There is no Antivirus software issue possible, because i don't run such crap.
AM is active in the FSX menu, also shows proper activation
Couatl is working fine too.
I have all of yours and flightbeams airports installed. OS = W764bit, FSX/Sp2,
Hope you have an idea to sort it out. I don't want to check my destination airport on every flight if it's still working.
regards