Rafaelz, I ran into the same issue trying to update my radio. I am actually just another Jeep owner like yourself, and I have been working with Uconnect to try and get the update to work on my Jeep. They are concerned with the update not working for me, and they asked me not to post the links to the files until more testing can be done.
Where are you located? Do you have European or North American WK?
While I thank you for posting the files for the new uconnect update, I´d like you to know that I have tried the Cherokee file on my WK2 with no luck until now. It says that the archive is not correct.
I´m really looking forward for this update since I could never get my phone to work with the car and the dealer is about 550 miles from here.
I will be happy to help you with further testing on my car if you want!
Are you planning to release the other files soon? I´ll be refreshing the page over and over! =)