If you are using an older version of SketchUp (specifically versions prior to SU2017), you cannot use the current updates. Instead, you must use a dedicated legacy/archived version
Update Checking: Notifying users of new features or critical bug fixes. The Legacy Divide: Pre-2017 vs. Modern libfredo6 old version upd
Current Status
This is mandatory for the new library files to sync with the extensions. SketchUcation 2. Perform a "Clean" Reinstall LibFredo6 - SketchUp Plugins | PluginStore | SketchUcation If you are using an older version of
Missing Toolbars: If icons don't appear after installation, right-click any toolbar and ensure the plugin is checked, or restart SketchUp again. You use SketchUp 2017 or older