@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".

Brand new to the forum as of today - forgive me please.

Downloaded ExtrudeTools_v2.1.rbz.

Question: What program is used to unpack the file, as it is not self-extracting?

Insights appreciated.