In December, 2009, a Director's Cut was released that included enhanced graphics, effects, music, and sound as well as more ghosts and creatures to generally heighten the mood and ambiance to provide a scarier atmosphere. The interface however remained largely unchanged. A couple of puzzles have also been made a little easier. Finally, the story has been enhanced with the addition of a few new characters and ghosts.
Source: Wikipedia, "Dark Fall II: Lights Out", available under the CC-BY-SA License.