Just heard back from the Rubber Monkey staff and they advised to check this directory (
C:\Program Files\Adobe\Common\Plug-ins\CS6\MediaCore) for any extra FilmConvert files. There was 1 .aex file there that was not removed, for some reason, even after the uninstall. I deleted the file manually and reinstalled the newest version and now, there is only 1 Film Convert plug in listed.
Problem solved!