What does Civil Netizen leave behind on my computer?
Your personal Netizen settings and your parcels are not deleted from your computer. If you do not wish to preserve your preferences and settings between Civil Netizen installations, then you should also delete the “~/Library/Civil Engines/Netizen” directory. Also, if you do not wish to retain any of your parcels, you should also delete the “/Users/Shared/Netizen/Shared Parcels” directory from your computer.