@krisidious said: .rbz files are extensions which must be installed from within sketchup at the preferences>extensions> menu. Go to this menu and click install extension... browse to the file and select. also you might consider getting the new "SCF Plugin Store" It's a plugin offered here at the site that searches, installs and removes plugins and extensions right from inside sketchup. Thank you so much. Your answer was "Grade A" and "Most Excellent".