I started the JB on 5.16.2.1, it installed fine, both MRPI and KUAL and KOReader (latest release from Github).
I went about setting up KOReader, noticed it didn't have any dictionaries included, the app helpfully suggested enabling Wifi to download one, which I did.
Closed KOReader after setting it up, didn't think to disable Wifi/delete the BIN files from root, and just shut the Kindle down and went to sleep.
Woke up in the morning to Kindle having updated itself to 5.16.3.1, the boot screen showed **** 5.16.x.x
**** or something like that, KUAL did show up in the book list but trying to open it resulted in 'Wrong app' or similar prompt.
Reinstalled the JB fix (update_hotfix_languagebreak-en-US.bin) through UYK menu, installed fine, on subsequent boots it shows the **** JAILBREAK**** note on boot.
I updated both MRPI and KUAL with most recent versions (released few hours ago, downloaded from the Snapshots thread), I also updated the installed KOReader to latest nightly from
https://build.koreader.rocks/downloa...65_2023-10-31/ - the kindlepw2 version
KUAL can be started but clicking any of the extensions installed (KOReader and Helpers in the menu) only results in return to book list.
(so, to reiterate, PW5 16 GB version, yes, **** JAILBREAK **** shows up on boot, yes, latest KOReader nightly, kindlepw2 version, sadly it's on FW 5.16.3.1 due to me being careless with Airplane mode)