Hello,
the problem has been solved.
In order to support other users, which may have the same problem like me, these are the steps which I did:
- backup the content of personal configurations of airports, located in %appdata%/Roaming/Virtuali/GSX
- removing GSX through control panel
- manually removing all files related to virtuali (%programdata% and %appdata%) except the registry entries
- restart
- shutting down Antivirus
- download the latest version from the FSDT server
- installing GSX L2
- restart
- running (in my case P3D) the sim
It works
- running antivirus and excluding "Addon Manager" from scanning
@ virtuali: Thank you for your support, and by the way, GSX L2 is really excellent.
Erwin