I think I must have described the problem inaccurately. I can launch Probe, I can use the program but god knows what it's done with the little readout hexagon shaped icons/readouts. I moved them off to the side of the desktop and they were gone. It must be a windows 7 thing, it must have moved them somewhere but I can't find out where. If no-one knows where Windows put them I will uninstall then re-install the program and hopefully that will cure it. Just curious where it went really just in case I lose something else down the same hole!.