Worked well but now won't start – PhotoScan by Google Photos Review

The app worked really well the couple of times I used it. But the last time out crashed and now won't start even after I force quit the app. *update* - I uninstalled and then reinstalled the app. It started up but then, first picture it started crashing again. As soon as I go into the picture and adjust the corners (particularly on a photo that is an unusual shape) the app enters “repeatedly crash” mode. Really disappointing.
Review by mozillalives on PhotoScan by Google Photos.