3D FlipBook - This plugin has not been tested with your current version of WordPress, braking features

The plugin after a year, doesn't work with my mobile menu options plugin. The books don't show up unless I disable that plugin. When I went to see the change log, i saw this message listed for the plugin "Warning: This plugin has not been tested with your current version of WordPress." This makes the flipbook useless on my site, but I paid for it.