And I'm wanting to add a little bit...I a bunch of SFX onto my desktop to take the program for a spin. Upon directing the program to the folder that I had placed 670 SFX, it scanned the folder ok and it located duplicates ok, but then within about 2 seconds the program crashes. I tried it several different ways, but no matter the option, if the program scans to search for duplicates...as soon as the results come up, the program crashes. I am running on OS 10.7.4, 2.66 GHz Intel Core i7 with 8GB of DDR3 ram.