I had the same problem as Jason for awhile. I finally figured out (by accident I think) that you can only download files if you're registered with SSTREAM. It appears that the company uses Docman to manage files and that the setting is such that you can only view info without an account. I'd suggest to SSTREAM that they change their settings so when you click on download it just tells you that you need to register rather than not making the file available at all.
So... if you'd like to use any SSTREAM products, register first. As to SSTREAM products?... I'm not an expert user but I've had quite a few problems installing different mods, bots and components so if you want to use them, you better be prepared for a project.