Have you disabled your pop-up blocker? Since the demo is contained in an external link, you will need to disable the blocker in order to get the link to be able to download it. You just have to click on the blocker which appears on the right side of the address bar when you click on the download demo button. Once you click it, you have the option to either click on the link directly or to disable the pop-up blocker for our page.
Let us know if it works!
