I have just purchased BobCad-Cam v19 (Hobby Pro). Along with the main program CD, I received a CD full of various 'post processors'. I cannot get ANY of the post processors to install. I just want the Mach 2 and 3 post processors but I have randomly tried others and I always get a "can't install file" message. I get the same message when I download the files directly from BobCad's website. I don't think there is a problem with my computer. Any ideas?