NOTE - This is for KeyShot 1.9 only.
Please find the latest SolidWorks importers here. These updates fix several issues with color assignments in SolidWorks 2010, and KeyShot not being able to read these:
www.keyshot.com/install/SolidWorks_Importer_32.zip (http://www.keyshot.com/install/SolidWorks_Importer_32.zip)
www.keyshot.com/install/SolidWorks_Importer_64.zip (http://www.keyshot.com/install/SolidWorks_Importer_64.zip)
Take the 2 files within the corresponding zip folder, and drop them into the KeyShot\bin folder, overwriting the old ones.
Thomas