Under each of the operating system options, all the download files are sequentially listed seemingly arbitrarily. To less technically-savvy users, this may be a bit intimidating.
One way to alleviate this could be by having one, no more than two, immediately-visible "preferred" download methods, and a hidden drop-down menu for "other download options." If I knew how to use design software, I'd provide a prototype of what I'm thinking about, but I could always provide a pencil-and-paper drawing if need be!