I’ve been using Jekyll/Octopress for a few years now and I’m stuck with octopress2 since the theme I use, named Cleanpress, has not yet been ported (if ever) to octopress3.
Converting the plugin to a shortcode is very easy. When I moved from Octopress to Hugo, I had to re-create two plugins (captions for images and codeblocks) and it only took a few minutes in Hugo. I could not find a link to the plugin on your website.