Cannot open jpg-files with double click (Win 10 Creators Update)

It seems to be a problem with the built-in Photos metro app in Windows 10 Creators Update. If you make double-click use the Opus viewer, or just about any other viewer, it should work OK.

For the Opus viewer: Use the Opus image viewer inside or outside of Opus.

We'll look into things and see if we can find a fix for the Photos app on our end.