• Support for Arduino preferences.txt in appdata\local
  
• Support for Arduino preferences.txt in appdata\roaming (default if \local is not found)
  
• Support for Arduino preferences.txt in ide\portable (default if exists)
  
• Location of Arduino preferences.txt is the default for all downloaded contributions
  
• Contributions storage location can be overriden in the Visual Micro options
  

Arduino 1.6.6 has re-located preferences and contributions folder from appdata\roaming to appdata\local. The above list ensures that Arduino 1.6.6 and earlier versions are supported. Visual Micro will switch from roaming to local after the arduino ide 1.6.6 or greater has been run once.