The directory below is the default location for where the presets are saved -- if you have moved the presets to a custom location, go there and then follow the instructions below.

To delete a preset:

• On Mac, go to: /Library/Application Support/GenArts/Sapphire/presets/genarts/

Select the Preset Look you want to delete. (They are in this format: S_PluginName_PresetLookName.gp.)

Right click on the preset file and select "Delete."