Cleansettings10.exe is a utility used to return all Dartfish settings to defaults. This includes software settings and Windows Registry entries.
No content or content metadata (such as keywords) are deleted.
If you have v10 Update 16, or higher you have the possibility to export your personal settings beforehand: User Settings - export and import the users's preferences
Download the utility below, close Dartfish, launch CleanSettings, select "Clean All" > Close.