Help with my 4K TT Box

A

AC Question

Hi I've tried following a YouTube link to download kodi 17.1 .
I was on kodi 16 and the link said uninstall indigo which I did and kodi isn't on now either .
When I go on to app installer it uses the local disc which then says No APK found .
Can anyone please help me get my life back in front of the TV ? 🙏🏻