To answer your other question, yes I have GSX installed but am completely confused by the new options on pressing Ctrl F12! Yesterday it had to do with Hangars and today it is about controlling sunshades at Zurich! Nothing about parking, deboarding etc. I suppose there must be a new manual out explaining this
There's nothing "new" about those options, and they are all explained in the Zurich manual. In fact, those options have been there forever, way before GSX, and it's the YouControl menu, which is present on almost all our airports.
If you press CTRL+F12, on an airport that DOES have a YouControl menu, with GSX installed, you should see a choice between the YouControl options for that airport, or calling GSX.
If you press CTRL+F12, on an airport that DOES have a YouControl menu, with no GSX installed, you will see JUST the YouControl menu, which is seems is what you are seeing.
If you press CTRL+Shift+F12, on an airport that DOES have a YouControl menu, with GSX installed, you will go directly to the GSX menu in any case.
If you press CTRL+Shift+F12, with no GSX installed, nothing will happen, regardless if the airport has GSX installed or not.
So, from your description of the problem, it looks like that everything is running correct, EXCEPT GSX, which doesn't seem to be starting correctly.
Are you SURE you installed GSX using the CURRENT installer, and nothing else ? Have you manually added additional files to the GSX folder, files that do not belongs to it, even in a previous installation ? If yes, they won't be removed by the Uninstaller (which doesn't know anything about them), but they might cause malfunctions.
Try to Uninstall GSX, and before reinstalling it, remove the whole FSX\fsdreamteam\Couatl folder, then reinstall it, using ONLY the CURRENT GSX full installer, and don't add anything else.