[Sawtooth]

As I said in the first message of this thread, Sunrise will crash if you use Command-Q or SWT -> Quit SWT. Use File -> Exit, or, as you discovered, close the window.
Note that when Sunrise throws an error on an image conversion (java.awt.HeadlessException: null), you will most likely have to Force quit it anyway (it will hang while quitting).
I'm going to add a small readme to the archive...

EDIT : Here is the new archive [EDIT: a new version is out, see later posts]. It has a readme and a license, SunriseCLI, Send to Sunrise and the documentation are more accessible and the application is a little better (its Dock icon doesn't briefly disappear during launch).