I thought I saw something on this. You won't damage your Apple TV 4 but you need to re-install it weekly. I can't recall the details but it has something to do with app signature and stuff. It is a PITA if you ask me. Do yourself a favor and get yourself an Android box to get Kodi on. You'll be much better off. They're cheap, you can get a Fire Stick for around $50 and work well with Kodi.
Hi. Thank you both for the reply to my situation. What it comes down to as you both suggested. and that would be is to purchase a stick or some to add KODI to and not the Apple. And that is what I'll do.