You have also access to 7 beta tracks but you can only select them with the mouse on the tracks menu (all the way down the list, it may not appear depending on your screen resolution or something). You can also play the reverse of the 4 tracks as 'red route'.
The KERS by default is on the X button with xbox controller and square for Dualshock.

It's only a TTP programm update. You can find a list of changes and give feedback on the R8 forums (not sure if we can discuss it here)