This is just a super program! As a photographer I seem to collect a plethora of idential images - you know how it is - backup, backup, backup - then years after the images are in use you still have copy after copy after copy.
Your program is the best I have found to locate all the identical copies - which over years have been spread over several computers and 3 external hard drives - saved me buying new storage hardware!!
One suggestion - not sure whether its technically easy or not - but when removing duplicates I was left with literally thousands of empty folders. Is there some simple way of removing the empty folders left behind when all their content is removed in the remove duplictes process?