Thanks so much futeko, as you advise me to do to update properly from Kodi Kodi 16.1 to 15.2? Sorry for the question a bit silly maybe, but I would not mess! Thanks again
Go to browser on Q5, navigate to this URL to download Kodi 16.1: http://mirrors.kodi.tv/releases/android/arm/kodi-16.1-Jarvis-armeabi-v7a.apk
After the download you'll be asked whether you want to install, select yes.
Kodi settings should be kept after upgrade. If you're worried about this do a Kodi backup first. http://kodi.wiki/view/add-on:backup