Hi Virtuali,
After uninstalling GSX 2 from C drive and using full installer to install to E drive, Gsx did not start, no menu, nothing.
I looked in the add on xml to see most of the entries still pointed to the C drive. I manually edited these to point to the E drive and GSX started. So guessing the installer did not update the add on xml correctly. Only guessing though.
Only issue, after using the airport editor without actually editing anything, when I closed the editor GSX and all menus vanished again.
I only post as it might give you a pointer to other non start problems users are having.
Regards Steve