You have to click on the "Go get it" button after you click on the "Get for free" picture where the shopping cart is. Then you'll get a list of all the files you "ordered". The BVH files will be listed along with UMF, and some other types. When I was downloading the files, I notice that my browser was adding a .txt extension after .bvh on the end of the file names. After I started choosing "All files" in the drop down list before saving, the .txt extension was left off.