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Pro Select files for deletion based on folder tree
You can select any point in a folder tree and mark all files nested within that tree for modification or deletion
Pro Select files by date
Keep only earliest copy, for instance.
Pro Ignore EXIF or ID3 tags when comparing files
So you can find duplicates of the same MP3 even if the metadata tags have been edited, for instance.
Pro Find similar images
Can find similar but not identical images, using aHash, dHash, or pHash