Found the problem with PVRX2 display missing menu:
I use the ATI driver mode 'horizontal stretch' to stretch the Windows desktop right across both monitors. PVRX2 doesn't like this. GBPVR is fine.
If I change driver mode to 'Extend' to second monitor it works ok.
I still prefer the stretch mode as then I get the task bar stretched over both screens, with the system tray on the right screen.
I guess I can switch modes if I need PVRX2, or stick with GBPVR.