1) Add folder(s) that you want to scan using "Add Folder"
2) Choose the scanning "Method"
3) If you use Similar Files method, adjust the "Similarity".
4) Press "Start Scan".
After checking which files you want to move or delete press "Move Checked Files" (2) or "Delete Checked Files" button (3)
The "Delete files to Recycle Bin" option will delete the checked files to the Recycle Bin otherwise they will be deleted permanently. You can move the checked files to a custom folder if you adjust "Move checked files to ..." option selecting the destination folder. Duplicates folder structure will be maintained in the selected folder.