[Plugin: WP Rotator] Change rotation

I was wondering if there is a quick method for making the widget rotate through random posts from a post type on page refresh (currently it rotates on a timer). I am using this for testimonials and am not happy with the testimonial plugins available. I thought I would just create a custom post type and am trying to expedite the development of the rotating functionality. If there is a better solution (premium plugin?), feel free to suggest something else. Thanks!

https://www.ads-software.com/extend/plugins/wp-rotator/