I looked at Google's cache
of the page and it says version 7.1 works in Windows Vista, which means it likely works well in Windows 7 too. However, CNet.com
says version 7.1 is only supported up to Windows XP.
Google took that picture only a couple days ago which could mean they're just experiencing technical difficulties. Since you can't even call them and their website hasn't been updated in years, I'd also guess they're closing shop.
Businesses are a huge part of the Windows market share. While Windows 7 was in development and it was realized that many older business applications wouldn't work past Windows XP, Microsoft decided to create Windows XP Mode
. It's a virtual machine which means you're running Windows XP inside of Windows 7. The downfall in your scenario means that if the program is running while in Windows XP, the program won't see what's outside the Windows XP screen, like what you're doing in Windows 7.