XTREAMER ULTRA 2 update to Kodi 17

Hello.

I have the XTREAMER ULTRA 2 htpc with openelec and Kodi version 15.2
It is possible to update the Kodi in the newest version 17?

Because I am begginer in this I’ll appreciate any help with siple steps
(if I can do this with an exe or zip file on USB will be great)

Thanks in advance