It is a "duplicate file finder" that goes beyond simple filename matching. It can compare files based on:

In the same "Options" tab, check the boxes for how you want to compare files.

Quickly filters out files that couldn't possibly be duplicates.

Since this specific version is a "scene release," ensure you have obtained it from a trusted source and scanned it with updated antivirus software, as modified executables can sometimes carry security risks.

You can choose to delete the checked files permanently, move them to the Recycle Bin, or move them to a specific "backup" folder to be safe. Safety Best Practices

Refines searches based on when files were created or modified. Quick Start Guide

Click the "Run" button. DoubleKiller will generate a list of all suspected duplicates.