First you have to have in your possession an Update USB Stick, supplied by Asymptote.
We then insert this into the USB port of the Viafreeze. The USB port is located on the back of the Viafreeze.
Now we need to navigate to the "Update" screen on the Viafreeze. After navigating to this screen, tap on the button which reads "Detect Update Script". A stream of text will appear underneath this button stating the "Request did not return bytes", which we can ignore. The relevant part of the message is contained at the end, where it should read that a valid update script was found. An example of the correct message is below.
Then we simply need to tap on "Update Software" and the Viafreeze will begin to update its software. This can take a little while, so please be patient. After it has finished, you will receive a message asking your to restart the Viafreeze unit. You can do this by pressing the button "Return to main menu", then pressing "Log Out or Shutdown", and finally pressing "Shut down".