You can use the Wifi connection to access the files on the Jackpot remotely from your computer, download a copy of any of the files, edit as needed (save a backup first) and then re-upload to the Jackpot. You will need to reboot the Jackpot for the changes to take effect.
This link leads to a post with key info:
although in the screen shots of editing my config.yaml I highlighted part of the new code, but forgot to highlight the new UART section just below it. That was caught and a clearer example of the needed code was shown here: