Hello, I'm having trouble installing LibFredo6, the error message appears:

Erro ao carregar o arquivo Fredo6_!LibFredo6.rb
Error: #<ArgumentError: invalid byte sequence in UTF-8>
c:/users/thaís/appdata/roaming/sketchup/sketchup 2017/sketchup/plugins/fredo6_!libfredo6/top_libfredo6.rbe:43:in gsub' c:/users/thaís/appdata/roaming/sketchup/sketchup 2017/sketchup/plugins/fredo6_!libfredo6/top_libfredo6.rbe:43:in get_dir_from_ENV'
c:/users/thaís/appdata/roaming/sketchup/sketchup 2017/sketchup/plugins/fredo6_!libfredo6/top_libfredo6.rbe:405:in dir_appdata' c:/users/thaís/appdata/roaming/sketchup/sketchup 2017/sketchup/plugins/fredo6_!libfredo6/top_libfredo6.rbe:204:in startup'
C:/Users/Thaís/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/Fredo6_!LibFredo6.rb:63:in process' C:/Users/Thaís/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/Fredo6_!LibFredo6.rb:70:in module:LibFredo6_Loader'
C:/Users/Thaís/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/Fredo6_!LibFredo6.rb:28:in <top (required)>' Erro ao carregar o arquivo Fredo6_JointPushPull.rb Error: #<TypeError: can't convert nil into an exact number> C:/Users/Thaís/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/Fredo6_!LibFredo6.rb:79:in -'
C:/Users/Thaís/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/Fredo6_!LibFredo6.rb:79:in <top (required)>' C:/Program Files/SketchUp/SketchUp 2017/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:54:in require'
C:/Program Files/SketchUp/SketchUp 2017/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:54:in require' C:/Users/Thaís/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/Fredo6_JointPushPull.rb:47:in module:Fredo6'
C:/Users/Thaís/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/Fredo6_JointPushPull.rb:26:in <top (required)>' Erro ao carregar o arquivo Fredo6_RoundCorner.rb Error: #<TypeError: can't convert nil into an exact number> C:/Users/Thaís/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/Fredo6_!LibFredo6.rb:79:in -'
C:/Users/Thaís/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/Fredo6_!LibFredo6.rb:79:in <top (required)>' C:/Program Files/SketchUp/SketchUp 2017/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:54:in require'
C:/Program Files/SketchUp/SketchUp 2017/Tools/RubyStdLib/rubygems/core_ext/kernel_require.rb:54:in require' C:/Users/Thaís/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/Fredo6_RoundCorner.rb:47:in module:Fredo6'
C:/Users/Thaís/AppData/Roaming/SketchUp/SketchUp 2017/SketchUp/Plugins/Fredo6_RoundCorner.rb:26:in `<top (required)>'

It does not open in the window bar, but old versions work.
I use Windows 8 and SketchUp Pro 2017.