Thanks for the prompt reply, it would be great if I can use my Kindle to read in bed tonight
Okay, so I am going to stick with the wiki article
5 x Jailbreak as the thread recommends doing so, and it also includes some extra info on KUAL etc which the spoiler does not.
In order to follow the steps exactly, I have now removed the directories I had copied over for MPRI, and after confirming I have the hotfix installed I manually installed update_kindle_5.8.7.0.1.bin.
Next I have extracted kual-mrinstaller-1.6.N-r14394.tar.xz to the top level of my Kindle, and input to the search bar ;log mrpi, and a dialogue window appeared telling me a new Chinese font was available, and prompted me to restart which I have.
Looking again at the second section of Step 9, the README in KUAL-v2.7.2-gea85a19-20171125.tar.xz tells me to put KUAL-KDK-2.0.azw2 in my documents folder and KUAL now opens!
Can you please now direct me to a thread, or tell me what I need to do, so I can sideload my books, epubs, pdfs, etc., so that they will appear in my Kindle library and I can read them from it?