free version works as expected when searching folders

I just downloaded it and tried it on a folder of car images. Folder had 2200 images. It found 153 duplicates. A click of a button to mark the duplicatess, then click Trash Marked. Done. Slick.Be sure to take a look at the Prefences for the program, as there are soem settings you can tweet to comare images (meta data, file size etc) and you can prioritize the settings as to what to validate first.

WoodchuckCanuck about Photos Duplicate Cleaner, v1.6.3