kodi17

was wondering why when I turned my tablet on last night I got starting for the first time and it loaded
kodi 17..i did not install kodi 17 and in fact had kodi16 on my tablet. I lost all the information I had on kodi16 as it was
not compatible with 17.why would my system upgrade to 17 without my permission.I consider this an invasion
of my privacy as it is my tablet and I did not upgrade…cn someone tell me why it upgraded on its own and how to avoid that in the future