My k95 platinum mx brown has 3.21.28 firmware version.
I noticed online there was a more recent version for the keyboard. My update was not working so I called support.
They sent me a v. 1.07.123 firmware that bricked my keyboard. I called support again and they helped me manually install firmware version 3.21.28 back on.
But I've read other's saying that there is a newer firmware. Is that the case?