Oh yes I know that's there. It's unchecked (I did try check it, with the opposite outcome).
But to be clear, I slew the telescope left using the left pointing arrow in the mount control, and my telescope slews left correctly. *However* the little reticule in KStars showing the position of the telescope moves RIGHT.
Same goes for all directions. If i flip the reverse button, and click the left button the telelscope slews right.. but then kstars moves left.