The jog tension adjust is nothing to do with software, its controlled by hardware alone. (its actually a small clutch pack with springs and friction pads) Therefore, it cannot be affected by upgrading the firmware, Its physically impossible!
If you need to adjust beyond the settings you can achieve with the knob, then its a case of opening the deck up and altering the spring tension (this is best left to a pioneer service technician if you do not know what you are doing.)
Hope this helps.
Steve