[DoctorOhh]

Originally Posted by rosencranz

Thanks everybody . Problem solved.
Incidentally,on a Mac the magic is to press combi CMD+ P to unveil the preference button

Thanks for the Cmd P clarification.

FYI for others dropping by this thread, you can always get to Preferences via the GUI and your mouse by following Griker's advice above if you don't see the icon. Preferences is the one item that Kovid has made it impossible to remove in such a way that it is not accessible via the mouse.