All is good. Thank you PGMusic for coming to my rescue! I received a Dropbox link from PGMusic today that had the missing setup files. Most of the time, Norton AV will put a suspicious file in quarantine. However, some of the installation files are big (hundreds of MB) so it outright deleted the large ones. Unfortunately, the installation files on the hard drive are different than the downloadable ones I received links to on the day I purchased, so I was stuck until I received the Dropbox link. I've submitted the files to Symantec so hopefully no one else encounters this issue. At least until BIAB 2014.5...