If the Addon Manager says the program is active, then it's active.
If you have the Trial airports menu in GSX, it's not normal, and the problem might be caused because you are running the sim or some other addon in "Compatibility" mode so, be sure every Compatibility mode is turned off for both the sim AND any 3rd party addon that runs with it.
If this doesn't fix it, it's possible the update hasn't finalized (so you are still old files), because your antivirus has mistakenly blocked the installation of some files, likely the Couatl.exe file, which must be updated too, but it wasn't because the antivirus blocked it. In this case, try to exclude the whole sim folder from scanning, and reinstall with the antivirus disabled.