Hi,
I have just thought of an idea, not an important request but more of an idea that I thought of.
I was using XnViewMP 0.69 (x64) in my Win 8.1 to save an edit to a large picture when I thought tat there could be some 'closing options' as tickboxes in the Saving progress throbber.
The tickboxes would be present beneath the Progress indicator throbber itself; not in Settings and not in anywhere else.
Tickboxes for:
=Close this tab after complete
=Quit program after complete
=Shutdown system after complete