new sass file when saving now causes an issue

when i know edit SASS files and save I get the below error:

C:/Users/x/AppData/Local/Temp/Mindscape/WebWorkbench/Ruby193/Ruby193/lib/ruby/siteruby/1.9.1/rubygems/customrequire.rb:36:in require': 193: %1 is not a valid Win32 application. - C:/Users/x/AppData/Local/Temp/Mindscape/WebWorkbench/Ruby193/Ruby193/lib/ruby/1.9.1/i386-mingw32/digest/sha1.so (LoadError) from C:/Users/x/AppData/Local/Temp/Mindscape/WebWorkbench/Ruby193/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:inrequire' from C:/Users/x/AppData/Local/Temp/Mindscape/WebWorkbench/Ruby193/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.4.3/lib/sass/engine.rb:2:in <top (required)>' from C:/Users/x/AppData/Local/Temp/Mindscape/WebWorkbench/Ruby193/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:inrequire' from C:/Users/x/AppData/Local/Temp/Mindscape/WebWorkbench/Ruby193/Ruby193/lib/ruby/siteruby/1.9.1/rubygems/customrequire.rb:36:in require' from C:/Users/x/AppData/Local/Temp/Mindscape/WebWorkbench/Ruby193/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.4.3/lib/sass.rb:99:in' from C:/Users/x/AppData/Local/Temp/Mindscape/WebWorkbench/Ruby193/Ruby193/lib/ruby/siteruby/1.9.1/rubygems/customrequire.rb:36:in require' from C:/Users/x/AppData/Local/Temp/Mindscape/WebWorkbench/Ruby193/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:inrequire' from C:/Users/x/AppData/Local/Temp/Mindscape/WebWorkbench/Ruby193/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.4.3/bin/sass:8:in rescue in <top (required)>' from C:/Users/x/AppData/Local/Temp/Mindscape/WebWorkbench/Ruby193/Ruby193/lib/ruby/gems/1.9.1/gems/sass-3.4.3/bin/sass:5:in' from C:/Users/x/AppData/Local/Temp/Mindscape/WebWorkbench/Ruby193/Ruby193/bin/sass:19:in load' from C:/Users/x/AppData/Local/Temp/Mindscape/WebWorkbench/Ruby193/Ruby193/bin/sass:19:in