Quick terrain adjustment in World Machine

This is a quick project for a small piece of digital terrain data in .DEM format where the ocean is the zero point. I need someone to lower the ocean 10-20 meters to make the seafloor and add a gradation or erosion so the shore line doesn't end up as a vertical drop. (But without losing any detail on the shore itself) No texturing or seafloor detail required. I need the .tmd file itself and everything must be accomplished within WorldMachine. Please examine the included WM project file.