I’m in the same boat as ChecMark: starter-theme appears to do literally nothing to my bbpress forum.
I note that instructions upthread are ambiguous: one guys says you need to put it into root of theme, not child theme; another guy says put it in child theme. I tried it in both, using twenty fourteen and a child; I also tried it in a basic twenty-thirteen. Nothing. I can see the folder, and move it around with File Manager, but no matter where I put it, it seems completely without effect!
I’m a rank beginner, obviously. What could be wrong?