However in my add ons tab all i have are “SODE 1.3.4” “FSUIPC”, “Couatl settings” and “Couatl Live Update” and “Add-on Manager”.
If you have both the Addon Manager and the Couatl menus, it means everything is working, the only possible reason why you don't have the GSX menu, is that you haven't installed GSX.
Yes, it's possible you activate it without installing, but maybe you downloaded another FSDT installer, or the Stand-Alone Addon Manager, and not the full GSX installer.
Be sure you download the full GSX installer. Use only the link on our webpage: some retailers provide a link to an old installer on their site, which is likely to be outdated.