Originally Posted by
kstrauss
Download the desired version from Tormach (updates are about 12MB), copy the file to a USB drive, insert USB drive in an available slot. In PP click "Update" on the Settings screen and follow the prompts. The identification of the version currently installed is displayed near the bottom right corner of the PP screens. I believe that the latest is 1.9.3. At least that is what I'm running.
It may be possible to update over Ethernet but that is not the recommended procedure and I have no idea how to do it.