I wanted to let everyone know that it is now available in the Fantasy Grounds Store:

Deepnight Revelation 3: The Crossing
Deepnight Revelation 4: The Far Side of Yonder

They are both available on Steam as well:

Deepnight Revelation 3: The Crossing: https://store.steampowered.com/app/3474580
Deepnight Revelation 4: The Far Side of Yonder: https://store.steampowered.com/app/3488180

Enjoy!