Would like to have the "download PDF" button generate a sensical file name (like "author-year-journal") instead of the string of numbers that it currently has. I know I can edit the name, but smoothing this interface feature would be nice.
You currently can set the naming convention for local files via our desktop app. You can set this up via Papers > Papers Settings > File Management.
This was a great feature in Papers2/3. I have no idea why it disappeared.