well, I continue to be a dummy. I did download the zip file and tried to extract it, but at best I get a message that it is missing some files and can't be extracted. I have also gotten the error that you described with the AF and transmission line files, but still couldn't get it to extract. I'm not even sure if I have the folder on the C drive set up the way it should be. Any help would be appreciated.
I noted on DIYaudio that he may move the software to someone else's site, that may be my best way of getting it, if and when it happens.