Hi Kemper folks...
Can you perhaps re-check the .zip file that you put up withy the 1.6.1 operating system on the main site? I can't get it to unzip on my Mac. I've had no issue with your other updates but looking into the archive on this particular file and it looks like it wasn't saved in a way that is friendly for us Mac users.
Many thanks for your help! In future a .dmg file would be preferred as a cross platform consideration such as you did with the cabinet file.
Paul G.