DoubleKiller Pro

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Professional (purchased) version

Application Details:

Version: 2.1.1
License: Retail
Votes: 0
Latest Rating: Bronze
Latest Wine Version Tested: 6.0.1

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Test Results

Selected Test Results

What works

DoubleKiller runs as a portable -- no installation required. My professional was apparently sealed into the portable: in Wine, it appeared to have normal functionality.

At startup, DoubleKiller Pro in Wine appears largely as it does in Windows. The buttons and tabs all work, as do the file comparison selection and other checkboxes.

File comparison appears to work. My brief test, involving largely the same files in an Ubuntu virtual machine's ext4 folder and an external NTFS USB drive, seemed to identify files correctly (according to e.g., dissimilar names and contents).

What does not

1. File selection malfunctions. At the level of a single file, file selection, checking, and deletion all worked. Unfortunately, there was no way to unselect a selected file: the only option was to re-run the comparison (which could take hours, with a large drive or many duplicates). Moreover, Shift-Click did not work to select multiple files: it appeared that I would have to select files by hand.

2. File selection produces an error, if you click again on a file that has already been selected: "An unhandled exception has occurred. Message text: "Access violation at address 0047EB7C in module 'doublekiller.exe'. Read of address 00000004." This error appeared harmless in my testing.

3. There appeared to be permissions issues. I am not versed in Linux permissions. This may not be a problem for a user more familiar with Linux.

4. Window resizing issue: after running a delete, the DoubleKiller window shrinks and then resizes. After running a final delete (i.e., no duplicates left), it freezes: I had to kill DoubleKiller and start over, if I had further need of it.

For me, the inability to select multiple files using Shift-Click, and to unselect a mistakenly selected file, were deal-breakers. I have at least ten years of experience with DoubleKiller. At present, I cannot use it in Wine. But a user seeking to identify only a small number of duplicates could find it useful.


What was not tested

DoubleKiller Pro has many features and options. It is not feasible to list all of the possible combinations that a user could test. More detailed testing could proceed at length through various combinations of file selection criteria, filetype and folder selection and exclusion criteria and masks, various filesystems on physical and virtual drives, and items on the Common Options tab.

Hardware tested


  • GPU: Other
  • Driver: proprietary

Additional Comments

I ran this test in an Ubuntu 21.04 desktop virtual machine in VMware Player on Windows 10.

More detailed writeup at https://raywoodcockslatest.wor...

Conceivably a user could use DoubleKiller to identify duplicates, export the results, and use that export as the basis for a script that would delete unwanted files. I would think this workaround would require more effort than it was worth -- that it would substantially degrade the user experience, to the point where the user would opt instead for a Linux-compatible duplicate detection program (e.g., dupeGuru). But possibly there are situations where such a workaround would be useful.

selected in Test Results table below
Operating systemTest dateWine versionInstalls?Runs?Used
CurrentUbuntu 21.04 "Hirsute" (+ variants like Kubuntu)Sep 08 20216.0.1N/A Yes NoBronzeRay Woodcock 

Known Bugs

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