I cannot find the %APPDATA%\Virtuali\GSX FOLDER.
What are you doing to "find it" ? You cannot search for this folder. The only way to open it, is to type exactly THIS:
%APPDATA%\Virtuali\GSX
Into either the blank area in a File Explorer window, then press ENTER or, after pressing the "Windows" key on the keyboard, start typing %APPDATA%\Virtuali\GSX and press ENTER
The right folder should open. If it doesn't, and you really did exactly what I said correctly, then perhaps you really don't have such folder, which is normal if you never made ANY change to the GSX customization page, ever, on any scenery.
How do I find this "AFCAD" and a "name"?
Just try to re-read my previous explanation more carefully, which gave you the precise directions to do that. I'll copy it again here:
Check the name of the AFCAD in use by GSX in airport customization page. The page which can be accessed from the GSX menu, it will list the name of the AFCAD used by GSX in the top lines. It's supposed to be the one in the Fsdreamteam\KJFK\Scenery folder. If it's not, you DO have a conflicting scenery.
That same page will also tell you if you DO have an .INI file under the %APPDATA%\Virtuali\GSX folder.