VST Instruments & F11 no longer works

I have just updated my Cubase 6 to the latest version from the website 6.07 and now if I go into the Devices menu and select VST Instruments (or press F11) I no longer get the Instruments pop-up, nothing happens at all. This is a real pain, does anyone know of a workaround for this, or should I try and go back to an earlier version?

It could be popping up off the screen. Try changing the screen resolution to find it.

I will try later, but I don’t think that is it as it doesn’t apperar in the windows list either.