Installing 17 on Raspbian Jessie

Hi – I installed V17 on Raspbian Jessie using this info – https://linuxsuperuser.com/install-lates…#comments. I am going to try next to install on another instance doing an upgrade from 15 to 17. However when I exited out of 17 it told me I was on Release Candidate 2 and that 17 stable was available. Can anyone tell me if there is a way for me to upgrade to 17 stable?

Thanks,
Fred