Firstly, thank you to all those involved in PW4 jailbreak. I can now organise my PW4 the way Amazon should have enabled in the first place.
I could use Calibe Collections aftre jailbreakon my old Kindle but not with my new PW4 until the 5.13.3 jailbreak. However Amazon soon put an end to that with the 5.13.5 update despite my attempts to prevent this and no longer could I organise my collection.
Hoping that the original jailbreak was valid I have managed to install an earlier 5.10.0.2_factory.bin from an earlier jailbreak thread (
https://www.mobileread.com/forums/sh...d.php?t=312489) which then allowed me to repeat the 5.13.5 jailbreak again.
I'm now running 5.11.2 with KUAL and librariansync. All I need now is a better way to avoid OTA updates.