As I remember it..I had Vista and downloaded 7 directly to my laptop. If you have XP it's a little more complicated. I think I saved the application to a usb and then just moved it to 7 which is a 32 bit. I don't recall any problems. But then I don't recall a lot of things!
I've got a Win-XP virtual machine running under VMware player (free for personal use) Also a Linux machine. These both can run in a Win 64 environment as the "host" no problem. I can actually have all three running at the same time. So if anyone has issues with it (Newport) running in Win7-64 this might be a low-cost way to go. Of course, you'll need a valid Microsoft Win-XP license for the virtual machine.