Upgrade from 13 to 14

Hello you wonderful people, I have a quick search around but was wondering if there is a reliable link to upgrading from FreePBX 13 to 14 as the link provided within the GUI is broken: https://wiki.freepbx.org/display/PPS/Upgrading+from+Distro+6


Don’t worry, I’ve just seen the link below pointing me in the right direction.