I think I pretty much covered it in the post where I said that I do not warranty it and that while it worked on my setup your results may vary.
The logic seems clear and unless you have files in directories that are "orphaned" and not a dupe of another photo in the actual database, there isn't any reason it shouldn't work. If you have orphaned files in directories, this utility will not clean those up.
Please do not PM me for support or sales questions. Thank you for your understanding.