This doesn't seem to be working for me. I am on an 2008 intel iMac running snow leopard and Tidy Up 2.1.1. I found a bunch of old music on an external hard drive of mine which were sorted into folders that represented the song's tags. But not all of the songs were tagged correctly when I imported them into iTunes. So I thought Tidy Up would be able to sort through my iTunes folder and the music folder on the external and find the duplicates that were tagged incorrectly. Since iTunes replaced the file names of the songs that were tagged correctly, I knew that in order to find the the dupes I would need to search the filename. I verified that the untagged songs were in the "Unknown Artist" folder of the iTunes music folder so I selected the folder along with the folder on the external. I verified beforehand that there was in fact at least one set of dupes from each folder with the filename "14 - Oh Very Young.mp3". However when I perform the search, it does not give any duplicates. It searches all the files because I can see the total files searched before it finishes, but it doesn't work. I then tried a search term for the filename "14 -" and it still did not find the files! I am really disappointed with this.