The latest version of the application is v1.0.1. The latest version of the plugin is v1.0.0
v1.0.1 of the MusicBee Remote application requires the v1.0.0 plugin. If you are on v0.13.0 or an older version then the Cover, Lyrics, Library Browse and maybe a couple of other features will not work.
Both the plugin and apks are available for download through the GitHub releases page of each project