I just downloaded and ran Mr. Clean.

First I tried drag-and-dropping a folder onto the icon. That didn't work. I launched the app and drug the folder to the application window. Nothing happened. I clicked the "Select Folder/Volume to scan" button and was greeted by the standard open dialog box. Dragging a folder to that window worked (of course.)

I selected the "Remove duplicates with changed names" option (which seems a bit of a misnomer given that I had no intention of actually removing the files - shouldn't it be "Search for duplicates with changed names"?)

I noticed two small black triangles with the exact appearance of the standard "click-this-triangle-to-show-more-info" icons used by the OS and other programs. Clicking them does nothing, they are apparently decoration.

The "Detailed log" option was on by default, excellent, just the way I like it.

I clicked the "Just look for unwanted files and log" button. It was very slow compared to other duplicate file finding software I have tried (today.) For an unnerving length of time the progress bar did nothing at all and then finally shot to the half-way point, stayed there as it listed subfolder names and then shot to 100%. Yet another progress bar that doesn't accurately depict progress.

The program produced a log and I immediately tried to expand the window to read the log because it is displayed in a very small text box. There is no resize corner icon but the maximize/zoom (green light) button extended the window vertically (and oddly moved it from where I had placed the window to the far left side of the screen as in location 0,0.) I read the log and again clicked the zoom button. To my surprise, the window did not return to its former small size but rather moved about 25 pixels to the right. Clicking the zoom button repeatedly causes the window to dance back and forth between the two locations but has no effect on the window's size.

A banner message above the log window reads "Command click on log to magnify font." That works although it only magnifies the first time, the second time it reduces the font to the original size.

The log displayed a list of paths to files that it had (somehow) determined to be duplicates. The filenames were reduced to 31 character names ala Classic. I am not running Classic, I am running 10.3.8 and virtually every file I create has a name longer than 31 characters.

Because of the truncated names I was unable to determine if the files it listed included ALL instances of a given file or only tertiary copies of the file (and not the first instance.) This renders the software utterly and completely useless for me.

Next I tried to ascertain how the software had concluded that the files were duplicates (are they EXACT byte-by-byte matches?) I could find no explanation in the program itself and no help menu was evident. I checked the Read Me file. No documentation regarding how files are compared is included.

I did however note that the Read Me mentioned a few things that had not been evident within the application such as "HOLD DOWN COMMAND KEY TO STOP PROCESS." I would never have guessed although it would have successfully cancelled had I typed the STANDARD command-period to cancel.

The documentation also mentioned that when scanning for empty folders it may need repeated runs to actually remove them all. The developer could first remove invisible files and then use an AppleEvent to perform a depth first deletion of empty folders and thus avoid having users run the program several times to trash empty folders.

find (path) -d -type d -exec rmdir {} \;

Due to the truncated filenames and the uncertainty as to how files were compared to determine which files are duplicates, I quit the software and moved it to the trash.