I am using Pinta 0.5 for editing a lot of files at the same time. And when there are multiple images opened and I just want to close the Pinta without saving all of the files it is annoying for asking me for each file if I would like to save it.

I suggest to have an additional two buttons added when closing multiple files without saving:
- Save all - it would save all the files. If file does not have a name it should save is like it has a temporaly name like "Unsaved image 1".
- Close all files without saving - it should close all files without saving.