reinstall old version of slideshow

Due to the design of our website, I want to reinstall version 2.2.11. I upgraded to 2.2.21 without thinking about if it would work with our current version of wordpress and know the slideshow won’t display on our homepage at BettyConfidential.com. We really enjoy the slideshow function, and would like to continue using it. Any recommendations on how to reinstall or fix the issue with the upgraded current version of slideshow (without upgrading wordpress)?

https://wordpress.org/plugins/slideshow-jquery-image-gallery/