Image Viewer alternative

[Leo]

@mlgch1

What I would like to happen is that when I double click an image file, that the file is opened with IrfanView as it does with Explorer.

See here:

How to stop the Opus image viewer from being used by default

Overriding the image viewer used within Opus Whether or not Opus uses its own viewer for double-clicks on images within Opus is controlled by this Preferences setting: Preferences / File Operations / Double-click on Files: Use internal picture vie…