Upgrade proces from 2.8 to 2.10

There used to be a series of links posted here: http://www.freepbx.org/forum/freepbx-distro/distro-discussion-help/stable-release-versions

To upgrade from 1.8 or 1.9 to 2.10 It’s no longer there.

Is there still a recommended process to upgrade?

Thanks.