replace kodi 16 by kodi 17

Hi guys. I am new at this game. I have a Cood-e (Kodi) streamer with pre-stalled Kodi 16. I want to replace it with Kodi 17. First I need to reset (empty) the streamer so I can install Kodi 17. How do I go about this and after the reset where do I get hold of Kodi 17 and after I get it (from the internet?) can I install it thru the internet connection on the streamer?
Does all this make any sense? I hope so!