Under FSX meny and addons I can only see Addon manager. There I can see that GSX is active....
As explained many times on the forum, when something doesn't seem to work, it's NEVER an activation problem. If something lose the activation for any reason, the program will not stop to work, it will go back in Trial mode which means, for GSX, working entirely at FSDT/Flightbeam airports, or on the Trial airports, with a message saying the program is not active, if you try to use it on a non-Trial airport.
So, your problem doesn't have anything to do with the activation, your problem is that something in your system has blocked the Couatl program ( so you don't see its menu ), which is required by GSX to run. The most likely cause for this is a faulty antivirus program that has detected a false positive.
- Download and install GSX with the Antivirus TURNED OFF
- BEFORE launching FSX, configure the antivirus to exclude the following files from scanning
YOURFSXFOLDER\bglamanx.dll
YOURFSXFOLDER\fsdreamteam\Couatl\Couatl.exe