New steinberg UR22 driver


I would like to know if the new driver 1.9.5 for the steinberg UR22 changes anything for windows 8.1 OS or is it only made for windows 10 OS ? I’ve a windows 8.1 os ; is it worth to install this driver ?

Another question : with the driver, it is possible to have 64 samples buffer size at 44100 hz : can we get a 32 buffer size sample at 44kHz please ? It would be nice for drummer !

Thanks in advance for your response.