Perhaps non-default filters, options, kind of thing.
Like Firefox's about:support has a "Important Modified Preferences" section.
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19.11.2016 20:10:59 - Modifications: 'Compare only files within the same source folder'; '64bit file system redirection'
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11/19/2016 04:49:26 PM - Files filtered: 4
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11/19/2016 04:49:26 PM - Files filtered: 4, Size & Text