Hi Jim,
I’m very sorry for overlooking this for so long. I was just contacted by email by another user who found the same thing using McAffee, and I found your post.
The good news (I think) is that McAffee may be wrong here.
I created the file FMSynth_5ContinousOutputs using a free (and legitimate, non-virus/malware) software called Platypus. It wraps up Mac executables so you can double-click on them and give them an icon.
The creators of OSX/Backdoor.Eleanor also used Platypus to make their app (see https://www.macrumors.com/2016/07/06/backdoor-mac-eleanor-faq/), and it looks like other people who’ve made software using Platypus have also been flagged by McAfee as matching this software (e.g., https://www.jamf.com/jamf-nation/discussions/20521/app-packager-is-being-flagged-as-eleanor-malware, http://stumpy.vuse.vanderbilt.edu/Malware.htm).
I will look into this further and try to find an alternative to Platypus that won’t cause this issue, but I don’t think there’s anything to actually worry about.