Neither Smart Converter or Smart Converter Pro convert copy protected files. Older versions of the apps allow you to add the file but will fail to convert your file. New versions will alert you before converting that the file you added has copy protection and cannot be converted.
Copy Protection is also sometimes called DRM (Digital Rights Management). It is a digital lock that prevents unauthorised copying, playback and converting. Movie purchases from the iTunes store and other online video market places will include copy protection on the video files you download. Music files can also be copy protected.
None of our apps will remove copy protection from files.