Adobe provides installers for only our current apps and the previous major version of each. (Acrobat is an exception: We provide only the current versions to ensure that you have the latest security updates.) We do not provide installers for apps we no longer sell.
Fortunately I found a copy of 5.7.1 that I downloaded a couple of years ago. Adobe will only give out the CC version that does not work. The copy I found does. Why won't they give out that copy? Thanks again for helping me.