Help H96 pro+. I have 9.2.8 Coreelec

I need your help, I have 9.2.8 Coreelec, but i want install CoreELEC 19.4-Matrix. I try update but h96 has kernel 3.14 and fail.
Please how can i install coreelec 19.4 in my tv ox??

H96Pro+: S912:

Ok, muchas gracias