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Dear Sir:

FastRawViewer does not set any 'default' handlers for file extensions. On install it is added to file extension (type) 'Open with' menu and will be set as  a default program only if

  • FRV is the only open-with program for given extension
  • or user checks 'always use this program' in program selection popup (in Windows 10; older versions may have different behavior like remembering last user choice).

Depending on WIndows version you use, Program - File Extensions associations are tunable via different methods:

  •  Windows 10:

  PC Settings - Apps - Default apps - choose by file type -

  Or Explorer -  right click on file - Open with - choose another app

  • Windows 7-8:

  Control Panel - Default programs - Associate default type

 Or right click method in Explorer

Using this methods you can reassign (or un-assign) default program for file types (extensions) you use.

Also, you may call Control-Panel style  windows control via FastRawViewer - Preferences - Other - Manage file associations and de-assign needed extensions from FastRawViewer


Alex Tutubalin/FastRawViewer team