FSX Gold, Windows 10, GSX 1.9.9.11
Ctrl-F12 has stopped working and the options "Couatl settings", "Couatl Live Update", and "GSX" have disappeared from the Add-ons Menu, leaving only "Addon Manager ...". In addon Manager, GSX is shown as "Product ACTIVE".
I've tried uninstalling and reinstalling but this has not changed anything. As far as I can tell, the only system changes since it was last working ok have been some standard Windows 10 updates.
Any suggestions, anyone? All will be gratefully received