So I've been using 2.0 directly from the site (just clicking the "use it online" link from the front page), and haven't had a problem with it. Today I went to download it so I could use it offline, and while the file downloaded, when I clicked the HTML index file in the folder, it opened a blank screen. I tried downloading it on a Mac and it worked fine. It's just not working with Windows and Firefox (though it works if I use the online link). Any ideas?