download from this site (http://sketchucation.com/pluginstore?pln=LibFredo6) and then install via dialog System Preferences -> Extensions -> Install Extension.
information from About dialog
INFORMATION
Plugin Subfolder = Fredo6_!LibFredo6
Plugin Root Directory = C:/Users/xxx/AppData/Roaming/SketchUp/SketchUp 2015/SketchUp/Plugins
Default Parameters Directory = z:/LIBFREDO6_DATA_Dir/DefaultParameters
Temporary Files Directory = z:/tmp
what i can change Default Parameters Directory ?