How to install MK?
MK is available in the official Kodi repository which is included by default in Kodi. You can install this addon by going in Kodi to System >> Settings >> Addons >> Get Addons >> XBMC.org Addons or Kodi.tv Addons
About SuperRepo and MK
SuperRepo does not maintain MK. We only provide an automated index for Kodi users to have easy access to MK and other addons for Kodi. We are not affiliated with the developers (Martijn) and do not provide help for this particular addon.