The operation of this feature is controlled by several tests that DVDFab applies to the disc content, which are explained in detail in the Tutorial, near the bottom of Not all annoying PGCs meet these tests, so the PGC is left in the output copy since it might be desireable playable content. Also, PathPlayer must be enabled for the feature to work or even be available as an active checkbox as you choose your backup settings. It does work on many annoying PGCs, I use it often.