Testimonial Manager, choose what test in widget?

I am using the Testimonial Manager widget and I love the format of the testimonials, how they appear as a widget. Thing is, I only want one particular testimonial to appear in the widget. It’s pulling them randomly from a list of about 10. I don’t mind people viewing all of them on the testimonial page, I made, but not on the sidebar, especially because some are a lengthy and push everything down on the sidebar. Is there a way that I can pick a certain testimonial to appear on the widget?