GSX went in demo mode and can't activate it

[Simone]

My GSX version was activaded and works great.
I went in holiday for 2 weeks and when I come back yesterday I bought a scenery (Aerosoft Florence X) and I installed it.
I also did a registry clean with CCleaner.
Then I started FSX and noticed that GSX went in trial mode but in the addon manager says it's activated because it only shows De-Activate button.
I de-activated and re-activated it few times with the .reg backup file and few times manually but it's still in trial mode and i can't use it in other airports if not at LIML, EDDM, KSFO.

I turned off firewall and antivirus

[virtuali]

Download and install the Stand-Alone Addon Manager for FSX.

[Simone]

Done, now i get "FSX has stopped working" at game start....

[Simone]

Fixed.
Now FSX starts normally but GSX still in trial mode

[Bruce Hamilton]

when you bring up the addon manager and highlight GSX, does it say "Installed and Active", or "Installed, but in trial mode"?  You said something about a reg cleaner, it might've deleted your serial number.  Did you save that little .reg file that was generated when you purchased?

[Simone]

Sure, I tried to use the reg key too....

[virtuali]

Do you run Windows 8 ? Do you use FSX or any of the FSX add-ons you run with it, in any of the "Compatibility" modes ?

[Simone]

Yes I have Windows 8.
It worked fine until I went away for 2 weeks...
In the addon manager it says "Product Active"

[virtuali]

Try to change the FSX\fsdreamteam\couatl\Couatl.exe file properties, to run "As Administrator", under the Compatibility tab. Every other compatibility option should be off, in every FSX add-on and of course FSX itself.