Update with current jailbreak thread

install/Installation-on-Kindle-devices.md

@@ -11,7 +11,7 @@ Certain minor features may currently still be unavailable on non-touch devices s
 ## Installation
 Besides the reader itself, you will also need to install a launcher. For that purpose, you can use KPVBooklet or KUAL, or even both, with the caveat that KPVBooklet only supports devices running FW 5.x, and may not function properly on recent FW 5.x releases ;).
 
-  1. Jailbreak your Kindle, refer to [this post](http://www.mobileread.com/forums/showthread.php?t=186645) or others, depending on your device (see the NOTE at the top of this page).
+  1. Jailbreak your Kindle, refer to [this post](https://www.mobileread.com/forums/showthread.php?t=320564) or others, depending on your device (see the NOTE at the top of this page).
   1. Install a launcher
       * Install KPV Booklet, refer to [this wiki](https://github.com/koreader/kpvbooklet/wiki).
       * Install KUAL, refer to [the official thread](http://www.mobileread.com/forums/showthread.php?t=203326)