Vu+ Openvix Kodi v 17.0 won't update

Hi, any advice for getting my Solo2 to update Kodi to 17.3? I am a newbie so an "idiots guide" response would be appreciated. (Everything I have read seemed to indicate the later versions of Openvix included Kodi 17.3 but after updating I still have Kodi 17.0, but being a newbie I may well be missing something quite obvious/simple). Any advice on this problem or anything else you think might help me in general would be fab. Cheers!