If the document version does not work, then use the booklet version.
If the booklet version only shows a blank menu, then try the "fix of the week", here:
https://www.mobileread.com/forums/sh...d.php?t=294765
The document version is: KUAL-KDK-2.0.azw2 (just move to /documents, like any other document)
The booklet version is: Update_KUALBooklet_v2.7_install.bin (put that one into /mrpackages and trigger MrPi with the search bar command).
(It does no harm to have both installed at the same time, such as when trying them both)
If something needs to be clearer, you can edit it.
That is why it is in the Wiki - anybody can correct it as things change with time.
Do not worry about "messing it up" - like all Wiki's the entries are all under version control.
If a mistake is made, anyone can roll back the change.
I don't understand the prompt about the new font.
Are you doing this while the device has an Internet connection available?
You really don't want it to connect to the Internet while doing all of this, it might update itself to 5.9.4 before you are ready.