Need Help Getting New Minix Z64 firmware

I have a minix z64 currently running firmware version 4.4.4. I can't run the new kodi 17.5 krypton because I need a higher firmware then 4.4.4 to run it. Can someone please link me to how I can get kodi 17.5 working or how I can find the download file to the minix firmware 5.0 or 6.0 which is android lollipop I believe. Been researching and can't find the right firmware files and already bricked one box due to the wrong file.

http://www.minixforum.com/threads/a...-and-kodi-17-running.16642/page-2#post-141480