When I try to install my CS6 upgrade, I get an error message that says my serial number is valid, but no qualifying product was found on my computer and asks me to enter my current product's serial number. I currently have CS3 Extended installed and fully functional on my computer. My problem is that I can't find the serial number for my CS3 Extended product. Is there a way to view my serial number from within CS3? I checked my Adobe account and my serial number isn't listed.