(Windows 7 through current version of Windows 10)
Prior to installing MovieCaptioner for Windows, you need to download and install QuickTime 7 and restart your computer to make the QuickTime libraries available to MovieCaptioner. MovieCaptioner for Windows will not launch unless QuickTime is available to it.
(Mac OSX 10.9 through current Big Sur Mac OSX 11.2.1)
(Mac OSX 10.6 through 10.15 Catalina)