There is no Windows 7 upgrade. They no longer make the software. It appears they have similar functions on their web site now. All you need is your web browser.
I don't think that they have an upgrade. You can run it under XP Mode, which you can download and install free from Microsoft if you have Win 7 Pro or Ultimate.
Another thing that you can try is to install the program in compatibility mode and use XP as the chosen mode.