App Crashes Continually On External HDD

I purchased this app to help dedupe my external drive which has become cluttered over time but I have attempted to scan the drive multiple times and each time the app crashes. Since I have already purchased the app I will try again after they have corrected the crash that I have reported. The app did work when I scanned my local drive but as an app/web developer I wish it provided more detail on the duplicates found. Most of my apps/websites share the same files as part of the framework and the grid that lists the duplicates makes it difficult to discern the locations for multiple duplicate files. A simple grid view of the results would make the finding much more useful.

mtortorice about Duplicate Finder - File Clean