For some reason, since a few weeks ago, every once in a while the file association for images like .jpg files will change to Grab (a built-in utility which is used for taking screenshots).
I'm on MacOS High Sierra 10.13.3 (the latest).
I want them to be opened with Preview, though, so I always change them back by opening Get Info on a .jpg file, changing Open With to Preview, and clicking "Change All". This works for a day or two, and then suddenly the association will revert back to Grab.
How can I fix this permanently so it doesn't keep changing back to Grab?
