Just a quick note. I just now got home and tried to download and install. When I downloaded with Firefox I got the 32-bit version. I got an error when I ran the 32-bit version of the install saying I should download the 64-bit version. Seeing again that there was no option to choose 32 vs 64, I tried loading up the website in IE 7. Sure enough, in IE, next to the "Windows XP or Vista" heading is "(64-bit)".