Does the Quick Shifter also work when downshifting (Blipper)?

NO.

Assisted downshifting (Blipper function) is a device that is not part of our sporting DNA as it is not a performance product and, in our opinion, loses the pleasure of having full control of the vehicle. It should also be borne in mind that a true Blipper, in order to work properly, needs sophisticated operating algorithms and a lot of real-time information on the operating dynamics of the engine and the vehicle. For an aftermarket product, this requires a level of complexity in terms of set-up and application that would far exceed the costs/manufacturing… which is why they only work on motorbikes that come standard with assisted downshifting systems, even though they take away, in our opinion, all the fun of riding a motorbike!