Let us group the scan-results,

by default.
It is way to much information when ALL the files that are suggested for deleting is spread all over the screen. A "default grouping" would give the user much more control, and might make the users actually CARE what files they are deleting.
To much information leads to "just push the button" and Garbage Finder will be blamed if the users delete files they did not intend to delete. Make it easy to see where the files are, and the users will care enough to look at it.