Since it works so well on other websites I have worked on, I just installed it on a new website. However, I wasn't able to attach an image from the media library -- I would choose it but then it would not show up in the widget even after I clicked on 'save' and refreshed the page. I uninstalled and reinstalled but to no avail. I finally realized that the reason the widget wouldn't pull an image was because I had a caption for the image in my media library before I attached the image. Once I erased the caption, I was able to attach the widget.
Just thought I'd let you know in case others have the same issue!