Upd: Libfredo6 Old Version
: The latest archived legacy version is typically v9.5k .
: These are designed specifically for SketchUp versions prior to 2017 (e.g., SU8, SU2013–2016). libfredo6 old version upd
Keeping LibFredo6 updated is critical because most Fredo6 plugins will stop working if the library version is too far behind the plugin version. Update for Fredo6 Plugins - Extensions - SketchUp Community : The latest archived legacy version is typically v9