Umberto,
I followed your instructions and uninstalled all the entries using Windows Control Panel > Programs & Features.
However, after reinstalling the latest Stand Alone Add-On Manager, when I press F12 within FSX, the GSX menu no longer appears with my options ie: request boarding, etc?
The Couatl Powered Products menu still appears in the FSX Add-On menu.
Any idea what I should do?
PS: Should I just reinstall GSX completely?
Rgds,
Steve