Hide Progress bar on Kindle 4

Hey there,

First post here, s far this forum was amazing in helping me with my kindle stuff :) I found an old Kindle 4 on ebay and just installed jailbreak and custom screensavers. I would like to hide the progress bar, but all I found was this script for the Kindle 3: https://github.com/muness/kindle-progress-bar-remover

To my understanding, launchpad does not work on Kindle 4? Is there any hack I can install to get the same result on my device?

Best regards