Found the issue, I think. The update just messed up the settings and removed it as the default app, leaving no app set. You need to readd Photos as the default. See screenshots...
Just ran into this issue today. Can confirm with Diane's fix but I had to go one more step and update Chrome since my user was trying to open a photo directly from a browser download. Setting the default app worked when opening a photo directly from the Windows download folder. When opening directly from Chrome it gave the "Not implemented" error until I updated Chrome.