If you have been using Kerberos.io v1, than you would have noticed that upgrading/updating was horrible. There was simple no easy way to do it: You had to reflash the SD card.
The good news is that with version 2, we now have an upgrade mechanism out-of-the-box. When signed in on the web interface, you can see the available versions on the system page.
When a newer version is available you'll see a notification on top of the screen, which will guide you to the system page. When selecting a newer version, a popup will be shown to ask you if you want to install the latter. When confirmed you will see the system downloading, installing and rebooting the system; it goes full automatically..
Bye bye, reflashing!