Roland products used to ship with Sonar X1LE,, On disk. It was easy to instal and easy to register. Once registered you get all the cool offers from Cakewalk. I have it and it's only use was to use as a gateway to upgrade to a real version. I found it was a very bad version of Sonar compared to what I had. Even Guitar studio seemed better.
For one there's isn't any usable VST's or even TTS-1. Cakewalk without TTS-1 is a waste of time for me.
I guess once Roland used up all those Xi LE DVD's they cheaped out and now just provide a link. And who knows if it works , you might be the first to try it. I would see if there is a forum for the Boss equipment and see what those folks say about it.
Or you might just try going to a freinds house and use a different computer. ( work?)
Cakewalk should do away with LE and just provide a one month free trail of at least Artist. I think they loose potential customers with LE.