Maybe that's why the explanation was taken off the softexpressions.com website. However, I noticed that the softexpressions website -- which tends to sell everything -- does not sell Quilt Pro 5 for Windows; they sell "Perfect Quilt" instead for Windows. Maybe they had to choose between the two?
Do you have a link to QuiltPro's explanation? I couldn't find it when I went to the QuiltPro website.