Are there any new update to be done, or is the unit at the latest tune ?

I purchase an in tune back in march 2014 it said it needed an update which I did ,Just want to know of the is an new updates for the DCX. Also do I have to put the stock tune back into the car before I download and Update Thanks Rich

WHAT IS THE DIFFRENCE BETWEEN THE 91 OCTANE TUNE AND THE DIABLO TUNE I HAVE A 2013 SRT WITH A CAI AND CAT BACK EXHAUST WHICH WOULD WORK BETTER? ALSO ARE THERE ANY UPDATES THAT NEED TO BE DONE THE INTUNE WAS LAST UPDATED IN MAY 2014 THANKS IN ADVANCE RICH S