All of Fredo’s RBZ files are always up to date at the SketchUcation PluginStore - the limited support he offers at the EWH might put you ‘out of step’.
Download the Lib’s RBZ from here:
[You can get current versions of all of the RBZs for all of Fredo’s extensions from the PluginStore…]
Then open the SketchUp v2018 menu item Window > Extension Manager > Red ‘Install Extension’ Button.
Note that older SketchUp versions have a different way of access the Installer [via Preferences]
Find the downloaded RBZ file, then it should install…
Answer in the affirmative to any prompts.
Restart SketchUp to ensure that the Lib and any installed Fredo extensions get fully synced…
Note that you need a membership to download from SketchUcation.
The Register section offers a free membership - follow one of the several blue links - all members can upload/download and participate in the forums at SketchUcation… however, an optional modestly proced ‘premium’ membership gives you more advantages - like Shop discounts, free downloads of many useful files etc - but that’s your choice…