The device is jail broken.
And since KUAL is working, its requirements are also installed.
Get the "Hotfix" package from the attachment on this post:
https://www.mobileread.com/forums/sh...postcount=1597
Put it in /mrpackages and use KUAL to trigger MrPI.
It will do no harm to install it again, if it is already installed.
That should be all you have to do, as in, your done.
(Other than install whatever add-ins you want to use.)