Rated 5 out of 5 stars
Followed ag7878 and rocugbg suggestions to no avail. I am using Vista 64bit Ultimate. Guess I will have to wait for the author to update.
My install.rdf was tried with 3.0, 3.0.*, 3.1 and 3.*. Still no results. The add-on install screen appears but it does not get installed.