PW Can no longer launch KUAL

Gruntbug · 04-23-2025, 03:19 PM

I jailbroke my PW (1) ages ago (maybe a year or two) and everything has been working fine. A few days ago, I started getting "This item is not signed by an authorized developer" messages when trying to launch KUAL.

I saw there were some KUAL-related updates but I have tried to install everything mentioned and I can't get anything to actually run/install. I replaced the KUAL azw3 file with a new one, but none of the .bin files will be recognized buy the kindle as an update.

Can anyone tell me how I'm supposed to fix/update this?
Do I need to start over and re-jailbreak, etc?

Thanks!

dhdurgee · 04-23-2025, 04:11 PM

Quote:

Originally Posted by Gruntbug

I jailbroke my PW (1) ages ago (maybe a year or two) and everything has been working fine. A few days ago, I started getting "This item is not signed by an authorized developer" messages when trying to launch KUAL.

I saw there were some KUAL-related updates but I have tried to install everything mentioned and I can't get anything to actually run/install. I replaced the KUAL azw3 file with a new one, but none of the .bin files will be recognized buy the kindle as an update.

Can anyone tell me how I'm supposed to fix/update this?
Do I need to start over and re-jailbreak, etc?

Thanks!

You need to update the developer keystore. Download the zip, copy the appropriate one for your Kindle to the mrpackages directory and then run MRPI via ;log mrpi in the search.

Dave

Gruntbug · 04-23-2025, 04:52 PM

DAVE! Thank you! That worked! I owe you a beer!

I thought I had to update the certs, but nowhere did it tell me exactly how to do that.

morrow · 04-23-2025, 11:06 PM

Quote:

Originally Posted by dhdurgee

You need to update the developer keystore. Download the zip, copy the appropriate one for your Kindle to the mrpackages directory and then run MRPI via ;log mrpi in the search.

Dave

Hello Dave, I been tackling this for the last two hours with no fruition, any help would be appreciated.

I have 2013 PW1.

I download the Updated (April) Kual from Snapshot and placed the AZW2 to DOCUMENTS.

I replaced the "developer.keystore" in MKK folder

I downloaded "DevCerts-20250419-KeyStore" and placed the "k5-ALL" to MRPackage in the Paperwhite foot directory and ran ";log mrpi" but nothing is showing ... and by clicking KUAL it still said "This item is not signed by an authorized developer ..."

I have also tried "k4-All" with the same result, ;log mrpi is not responding at all.

dhdurgee · 04-24-2025, 12:25 PM

Was MRPI working before this? Perhaps something happened to your JB. Were you protected against a firmware update? Check and see what firmware you are on to see if it has changed.

I would try installing the latest hotfix for your device and firmware and see if that helps. Beyond that I would check the posts regarding snapshots and KUAL at the top of the forum.

I hope you can get things back into operation.

Dave

morrow · 04-24-2025, 09:10 PM

Quote:

Originally Posted by dhdurgee

Was MRPI working before this? Perhaps something happened to your JB. Were you protected against a firmware update? Check and see what firmware you are on to see if it has changed.

I would try installing the latest hotfix for your device and firmware and see if that helps. Beyond that I would check the posts regarding snapshots and KUAL at the top of the forum.

I hope you can get things back into operation.

Dave

Last time I even touched MRPI was last October to install display book cover, so it should be working. It is a old Paperwhite 1st Gen, so it's forever stuck on 5.6.

I tried the hotfix (placing the Bin file in mrpackage and search ;log mrpi) and showing nothing. Pressing enter simply return me to the home page.

All the things I tried:

1. Download the newest KUAL from snapshot, place the azw2 file to DOCUMENTS
2. Replace the keystore in the MKK folder
3. Place the UPDATE_Booklet_*_Install bin file to mrpackage folder and tried ;log mrpi.
4. Place the UPDATE_BOOKLET_HOTFIX_*_Install bin file to mrpackage folder and tried ;log mrpi.

DNSB · 04-24-2025, 10:34 PM

Have you tried placing one of the *_Install.bin files in the root of your Kindle and then seeing if they show as an update?

morrow · 04-24-2025, 10:40 PM

Quote:

Originally Posted by DNSB

Have you tried placing one of the *_Install.bin files in the root of your Kindle and then seeing if they show as an update?

Yes, it did not recognized as an update.

coffeeT4ble · 04-25-2025, 04:55 AM

Could you specify which zipfile and where I can find the updated keystore ?

Thanks

SpartanHeavy · 04-25-2025, 08:43 AM

Quote:

Originally Posted by coffeeT4ble

Could you specify which zipfile and where I can find the updated keystore ?

Thanks

https://www.mobileread.com/forums/sh...postcount=1295

coffeeT4ble · 04-25-2025, 10:18 AM

Quote:

Originally Posted by SpartanHeavy

https://www.mobileread.com/forums/sh...postcount=1295

Thank you so much, I needed this for a school project (^^)

haadi71 · 05-22-2025, 01:20 PM

Quote:

Originally Posted by SpartanHeavy

https://www.mobileread.com/forums/sh...postcount=1295

This developer keystore zip doesn't contain the bin for my kindle paperwhite 1 i.e PW

huancito · 05-27-2025, 02:38 PM

Hey folks, facing the same issue here. In my case I'm jailbreaking my devise for the first time.
Devise: Kindle PaperWhite Wifi - B024 - PW
Firmware: 5.6.1.1

Steps to replicate
1. Factory reset
2. Downgrade FW to 5.4.4 following OP advice from https://www.mobileread.com/forums/sh...08&postcount=7 (before I found this thread)
3. Jailbreaked with K5 Factory JailBreak (Factory FW) following https://www.mobileread.com/forums/sh...d.php?t=186645. Got "**** JAILBREAK ****"
4. Given that I got v1.16N I did not install MKK
5. Restarted the devise ([HOME] -> [MENU] > Settings -> [MENU] > Restart)
6. Installed KUAL by pasting KUAL-KDK-2.0.azw2 into my Documents folder
7. Get the error trying to open KUAL

Things I've tried so far:
- Repeated all steps to make sure I got the same result
- Placed Update_mkk-20250419-k5-ALL_keystore-install.bin in the root folder and updated (got that file here https://www.mobileread.com/forums/sh...postcount=1295)
- Installed MRPI following https://www.mobileread.com/forums/sh...d.php?t=251143, placed Update_mkk-20250419-k5-ALL_keystore-install.bin inside mrpackages directory and then run MRPI via ;log mrpi in the search

Still get "This item is not signed by an authorized developer" every time I try to open KUAL.

Haven't tried this one yet: https://www.mobileread.com/forums/sh...postcount=1597
But as I've never upgraded FW after downgrading it, I'm not sure if that's required.

To prevent any unexpected upgrade, I haven't connected my devise to wifi since the factory reset.

Anything I might be missing?

04-23-2025, 03:19 PM	#1
Gruntbug Junior Member Posts: 9 Karma: 50662 Join Date: Jan 2024 Location: Washington, DC Device: Kindle PW	Can no longer launch KUAL I jailbroke my PW (1) ages ago (maybe a year or two) and everything has been working fine. A few days ago, I started getting "This item is not signed by an authorized developer" messages when trying to launch KUAL. I saw there were some KUAL-related updates but I have tried to install everything mentioned and I can't get anything to actually run/install. I replaced the KUAL azw3 file with a new one, but none of the .bin files will be recognized buy the kindle as an update. Can anyone tell me how I'm supposed to fix/update this? Do I need to start over and re-jailbreak, etc? Thanks!

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04-23-2025, 04:52 PM	#3
Gruntbug Junior Member Posts: 9 Karma: 50662 Join Date: Jan 2024 Location: Washington, DC Device: Kindle PW	DAVE! Thank you! That worked! I owe you a beer! I thought I had to update the certs, but nowhere did it tell me exactly how to do that.

04-24-2025, 12:25 PM	#5
dhdurgee Guru Posts: 898 Karma: 3000000 Join Date: Jun 2010 Device: K3W, PW4	Was MRPI working before this? Perhaps something happened to your JB. Were you protected against a firmware update? Check and see what firmware you are on to see if it has changed. I would try installing the latest hotfix for your device and firmware and see if that helps. Beyond that I would check the posts regarding snapshots and KUAL at the top of the forum. I hope you can get things back into operation. Dave

04-24-2025, 10:34 PM	#7
DNSB Bibliophagist Posts: 45,379 Karma: 168808725 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	Have you tried placing one of the *_Install.bin files in the root of your Kindle and then seeing if they show as an update?

04-25-2025, 04:55 AM	#9
coffeeT4ble Junior Member Posts: 3 Karma: 10 Join Date: Apr 2025 Device: K5	Could you specify which zipfile and where I can find the updated keystore ? Thanks

05-27-2025, 02:38 PM	#13
huancito Junior Member Posts: 1 Karma: 10 Join Date: May 2025 Device: Kindle Paperwhite	Hey folks, facing the same issue here. In my case I'm jailbreaking my devise for the first time. Devise: Kindle PaperWhite Wifi - B024 - PW Firmware: 5.6.1.1 Steps to replicate 1. Factory reset 2. Downgrade FW to 5.4.4 following OP advice from https://www.mobileread.com/forums/sh...08&postcount=7 (before I found this thread) 3. Jailbreaked with K5 Factory JailBreak (Factory FW) following https://www.mobileread.com/forums/sh...d.php?t=186645. Got "** JAILBREAK **" 4. Given that I got v1.16N I did not install MKK 5. Restarted the devise ([HOME] -> [MENU] > Settings -> [MENU] > Restart) 6. Installed KUAL by pasting KUAL-KDK-2.0.azw2 into my Documents folder 7. Get the error trying to open KUAL Things I've tried so far: - Repeated all steps to make sure I got the same result - Placed Update_mkk-20250419-k5-ALL_keystore-install.bin in the root folder and updated (got that file here https://www.mobileread.com/forums/sh...postcount=1295) - Installed MRPI following https://www.mobileread.com/forums/sh...d.php?t=251143, placed Update_mkk-20250419-k5-ALL_keystore-install.bin inside mrpackages directory and then run MRPI via ;log mrpi in the search Still get "This item is not signed by an authorized developer" every time I try to open KUAL. Haven't tried this one yet: https://www.mobileread.com/forums/sh...postcount=1597 But as I've never upgraded FW after downgrading it, I'm not sure if that's required. To prevent any unexpected upgrade, I haven't connected my devise to wifi since the factory reset. Anything I might be missing?

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