I'm not sure what is going on. First, I had all kinds of trouble trying to register my serials for Level 2. After several hours, I finally got it to work. Then I tried to change a jetrway at FSDT KDEN. For several tries, the editor would disappear and I would have to start again -- restarting P3d, etc. I finally got the jetway excluded and reopened the sim. NO GSX at all. Opened Addon Manager and Level 2 had gone back to trial mode. It again took several tries before I could get the serial registration box open and then it would just close after I put in my code.
This is all very time consuming and resembles beating one's head against a wall. Looking at the forum, I can see I'm not the only one with problems.