Master Your Curves: How to Download and Install Curvizard for SketchUp
Get the Curvizard RBZ file from the SketchUcation PluginStore (registration is free). curvizard sketchup plugin download
The icons are somewhat abstract. You’ll need to hover over them to read the tooltips or watch a quick tutorial to understand exactly what "Simplify" vs. "Smooth" will do to your specific geometry. Master Your Curves: How to Download and Install