I have installed and activated the plugin.
In the groups section, I can choose from name, permalink and description.
In the whistles section, I can create a new whistle, then type the title, content and whistle groups – nothing else.
The first image at http://wordpress.org/plugins/whistles/screenshots/ shows a window which I cannot find anywhere.. Actually, the section/window shown in the second screenshot is the only one I can get to.
Did I somehow receive version 0.0.1?