This doesn't work with version 1.4.7 I don't think. At least not with my theme "Executive", it broke my pretty URLs to display just white pages. I do not recommend this to anyone, it could break your forum.
I think rather just write a review, you should post into the discussion thread to find the reason why because it is working for others. It is a chance to get supports as well.
I think this add on is a good idea and useful for forum that have the "secret".
Excellent and Keep update!
Thank you very much for the update and this mod