Gnome: How to change app association by file extensions?

In Gnome Files (nautilus), when right click on an image file, there are a few applications listed that can open the file, with “Image Viewer” as default.

How can I change the default to, say, gthumb? Will this change also apply when using other file managers like Double Commander?

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Setting unlisted application as a default - #2 by vgaetera

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