The Smoke uninstaller does not remove certain hidden folders that hold important Smoke configuration files as well as your project data and user preferences. This makes it easy to recover project, user and configuration data when you reinstall Smoke. Keeping /usr/discreet intact is also required if you have other versions of Smoke still installed on your Mac. All versions of Smoke share the /usr/discreet folder.
However, if you wish to completely remove all versions of Smoke from your Mac, follow the instructions in this article to delete all Smoke folders after you have run the uninstaller
Warning! Deleting the /usr/discreet folder listed in this article will cause you to lose ALL project and clip metadata you had in Smoke. This does not affect the actual media intermediates hosted on the Autodesk Media Storage drive, nor soft-imported media.