Hi, strange quiet firmware upgrade happened to my beloved PW4.
I am not sure if I were running the update_kindle_all_new_paperwhite_v2_5.10.0.2_facto ry.bin or update_kindle_all_new_paperwhite_v2_5.11.2.bin .
If I remember well I have installed a recent jailbreak hotfix cc 2 months before. (I have jailbroken two other kindles that time that is why I am not completely sure what happened to mine, but most probably I had updated the hotfix on mine as well.) I don't remember whether I have set upgrade protection again, but I definitely set it in 2019 originally.
Some days before I was running KUAL to start KOReader, today KUAL was not able to run: "Application Error The selected application could not be started. Please try again.". I have checked the firmware version and to my surprise it was 5.13.4
So the question is whether I can re-gain the jailbreak (without the serial method) or I have to switch off WiFi and check time to time whether a new method is discovered?