Can anyone help me pls? I am getting this error at load after installing LibFredo -v7 for sketchup 2016.

Error Loading File Fredo6_FredoScale.rb
Error: #<ArgumentError: wrong number of arguments (2 for 1)>
C:/Users/alexa/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/Fredo6_!LibFredo6.rb:308:in top_load' C:/Users/alexa/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/Fredo6_FredoScale.rb:29:in module:Fredo6'
C:/Users/alexa/AppData/Roaming/SketchUp/SketchUp 2016/SketchUp/Plugins/Fredo6_FredoScale.rb:26:in `<top (required)>'

Thank you !