My main use of Paint.NET is taking numerous screen grabs and hacking them all together to produce a new image for use in my own software.
This leaves me with 1 image saved and sometimes 10, 20 30 or more unsaved images that I don't want. To tidy up ready to do more work, I like to close all the images, but closing 30 unsaved images individually (with a confirmation for each) is pretty slow. So I usually close/reopen Paint.NET.
It would be nice to have a Close All option on the menu that acts the same as when closing the application (show the dialogue of all unsaved images and allow c