I actually have a client who purchased an MX-850, when they asked for programming help, I was unable to get the software at all. It IS possible to get the software, but you have to register your product with them, then the download becomes available.
Yet, since I didn't purchase the product, I don't have any access at all, and when I called them, they let me know that they couldn't help me at all.
At some point I imagine that places like Remote Central will have some people that can hook others up with the programming software rather easily. But, if you have bought a remote, it should be easy enough to get the software online. Unfortunately, it does seem like the link to allow that to occur is no longer available on the URC website. Meh - bad form on them.