The Select airport screen APPEARS , listing the gates and options. For troubleshooting purposes I exit the select airport screen. Immediately I have the same problem.
To make sure that other drop down menu options still work under add-ons I select EZdok and Active sky weather request they work. However i select GSX menu select any options and nothing happens. For example I select add-ons , scroll to GSX, scoll to disable GSX disable nothing happens. Any option I select nothings happens under GSX or coualti menu options nothing happens.
Like I said in my first posting, the same thing is happening. I tried pressing tab and checked behind the P3d window and nothing shows up. Now I have to close the sim, reopen it and maybe reinstall live update or the airport. Once I select customize airport first time on the sim the GSX menu appears but no action happens.