Open Google Play, search WBMC, select one or both of WBMC 17.6 and WBMC 18.0 and install. If you prefer, you can continue to direct download all the WBMC forks by clicking this link. WBMC 17.6 is already loaded on our Android Smart TV Boxes and we also install WBMC 18.0 when requested.
For once, we are going to sing our own praises. Wonderbox.tv were the first to release a fork of Kodi 17.6, the first to release a fork of Kodi 18.0 and now the first to have have a Kodi 18 app listed in Google Play. Enjoy!