SimLab Step Importer is a plugin for SketchUp.
STEP importer for SketchUp plugin, enables users to import *.stp, *.step files . The plugin imports geometries, colors, and normals.
The plugin is supported on SketchUp 2013, 2014, 2015, 2016, 2017, 2018, and SketchUp 8 on Windows and Mac.
Users who already have a valid license for the old version of the plugin, can download from here.