I had the same problem with my K95 Keyboard, with the escape buttons and other buttons, not only that my Scimitar mouse was arbitrarily changing lighting affects and dpi when I had both disabled, opening 6-10 instances of my web browser when I clicked to opened it, even starting one of my games windowed when it is set to full screen.
The only fix was to uninstall this latest version and install and older one, unfortunately the last one I had saved was from March however everything is working normally now, so I will not update it that is for sure.