MobileRead Forums - View Single Post - KUAL: Kindle Unified Application Launcher (v2.7)

Joseph2046 · 06-21-2025, 07:44 AM

Hello, I have a Kindle Keyboard 3G (B006) running software version 3.4, successfully jailbroken using Update_jailbreak_0.13.N_k3g_install.bin, MKK is also installed using Update_mkk-20141129-k3g-B006_install.bin.

I want to install Koreader, so I have to install KUAL and MRPI first and I follow the instructions from this link
https://kindlemodding.org/jailbreaki...ing-kual-mrpi/

My Kindle is a legacy device, I extract the file KUAL-KDK-1.0.azw2 from KUAL-v2.7.37-gfcb45b5-20250419.tar.xz and send it to the device (put it under the document folder).

However, when I tried to open it, I got the popup "The title is not signed by a registered developer.".

I tried to update the MKK with Update-mkk-20250419-k3g-B006_keystore-install.bin, but it doesn't help.

Does anyone have any idea of what I could do now?

06-21-2025, 07:44 AM	#2394
Joseph2046 Junior Member Posts: 3 Karma: 10 Join Date: Jun 2025 Device: Kindle Keyboard k3g	Please help, problem installing KUAL Hello, I have a Kindle Keyboard 3G (B006) running software version 3.4, successfully jailbroken using Update_jailbreak_0.13.N_k3g_install.bin, MKK is also installed using Update_mkk-20141129-k3g-B006_install.bin. I want to install Koreader, so I have to install KUAL and MRPI first and I follow the instructions from this link https://kindlemodding.org/jailbreaki...ing-kual-mrpi/ My Kindle is a legacy device, I extract the file KUAL-KDK-1.0.azw2 from KUAL-v2.7.37-gfcb45b5-20250419.tar.xz and send it to the device (put it under the document folder). However, when I tried to open it, I got the popup "The title is not signed by a registered developer.". I tried to update the MKK with Update-mkk-20250419-k3g-B006_keystore-install.bin, but it doesn't help. Does anyone have any idea of what I could do now?