Can't find my old disk or download info with serial number. When I click in my current ver 7x help window/about, I see the version number and a long number (maybe 40 letters and numbers) in the lower right of the window. Is that my serial number? I think I need it in order to purchase the upgrade. I know I should have recorded it someplace handy, but that was years ago and can't remember if I did. Thanks, anyone?