Help for older unit running extremely slow

[Lauridsen]

Hi all,

I have recently bought a car, which has an older Pumpkin unit installed. However, this unit is running very slow and near impossible to use.
Therefore, I want to know if I can upgrade the unit with new firmware?

Here is information about it:
MCU version：MTCC-KLD6-V2.91 May 31 2016 19:54:14
Android version：5.1.1 1024*600
Kernel version：[email protected] #42Tue May 17 21:50:34 CST 2016
Build number：rk3188-userdebug 01062016.18:49:08

Any help is appreciated