I was able to get rid off the issue with full GSX L1 re-install. I don't understand I should have been done that
Totally unnecessary, since they are on the same Live Update server so, the Couatl.exe they download is exactly the same. It will work just the same if you install the current installer.
Umberto, we're not beta testers here, especially those who haven't bought L2 yet.
As if every other flight sim product was EVER released without problems on release day.
Not that this has anything to do with your problem, since the one and only Couatl.exe which is online now is clearly the same with the old and the new GSX (unless you installed with the network disconnect).
Maybe you haven't noticed, but we had a fairly large update yesterday so, it's possible you were installing exactly while we were uploading new files so, and this can cause a mismatch of versions that might result in the programs not running. We TRY to do it as late in the night as possible, but it's basically impossible to be absolutely sure nobody will ever be affected.