In the Nubitus Update section, download the version of firmware you want.
Nubitus update files are named “nubitus.auf”
Connect the Nubitus key in your computer.
Put the downloaded file on the Nubitus key.
The LED will turn RED and start flashing. Do not disconnect the key at that point.
When the LED stop flashing, unplug and plug again the key in the computer.
The key is now updated.
To verify the update, connect to your Nubitus with the mobile application and the version in the title of the status page should match the selected update version.