On the Preset tab > Shell Preset, you will find two different shell presets for MW. One is MW Emulate, and the other is MW Remove.
MW Emulate: The preset has been designed to emulate (copy the function of) substances within the Spooky2 MW database. Select this preset, then select the substances you wish to emulate.
MW Remove: The preset has been designed to disable substances. Select this preset, then select the substances you wish to disable.