The switch presentation feature works but when removing all links to the alternate presentation and then removing the secondary presentation from Presentation Properties and saving the modified file, the publishing feature continues to publish media files not contained within the primary presentation. The work around is to completely exit the app and then open/publish the modified (primary) presentation. I do realize the secondary presentation must be modified as well but I had used SAVE AS to copy the primary and want to use the original playlist as built.
Note examining the .bpf file showed no relationship to media files being published, but current-sync-xml listed those media files.