Unfortunately I updated and I think I lost the jailbreak. When trying to open KUAL I get an error message. When using the ";log mrpi" command to install KUAL, I get the message "hush, little baby" and then "Destroying package...ng". Kindle restarts and KUAL is not installed.
Fortunately this was a Kindle with a defective screen and I use it more for testing. My main Kindle I will not update.