When two identical files are compared in winmerge the message "the selected files are identical" has a check box "don't display this message again".

Is there away to reset this setting back once it is enabled ?

2 Answers 2


To restore the default settings, uninstall and re-install WinMerge.

There is no such option in the program's settings under the menu Edit > Options...

You can write about this lack in WinMerge Support.

  • I have WinMerge 2.16 here and option has not been added. Did you check in the the Compare window for this option
    – John
    Jan 25, 2020 at 12:40
  • I did that and after the windows restart, the setting is enabled back
    – thanos.a
    Jan 25, 2020 at 12:40
  • @john I have checked it in and it doesn't exist
    – thanos.a
    Jan 25, 2020 at 12:42

Use Registry Editor. Search for Computer\HKEY_CURRENT_USER\SOFTWARE\Thingamahoochie\WinMerge\MessageBoxes. There should be an entry 18101, change the value 1 to ffffffff.

  • Thanks! On my version, the entry was 42101 instead of 18101
    – nkanani
    Jun 5, 2022 at 11:49

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