PW Can no longer launch KUAL

I jailbroke my PW (1) ages ago (maybe a year or two) and everything has been working fine. A few days ago, I started getting "This item is not signed by an authorized developer" messages when trying to launch KUAL.

I saw there were some KUAL-related updates but I have tried to install everything mentioned and I can't get anything to actually run/install. I replaced the KUAL azw3 file with a new one, but none of the .bin files will be recognized buy the kindle as an update.

Can anyone tell me how I'm supposed to fix/update this?
Do I need to start over and re-jailbreak, etc?

Thanks!