Installed the widget. When I click on the "+" in the widget to add an image, I see the usual computer-URL-media library choices. When I click on an image from the media library, I see no "Send to Image Rotator" Widget button anywhere to add it. Same goes for adding an image from the computer or from a URL -- no place to click on to add it to the widget.
On the page where the actual sidebar is, I see the text: "You must add an image in the Widget Settings."