title: Wix installer keep user settings config on upgrade
body: <p>I have a WPF application that uses user settings to store the users preferences and I use the Wix installer to install the application.  When the application gets installed, the default config file is placed under the install location, for example C:\Program Files[CompanyName][ApplicationName].  When a user makes changes to their preferences in the application, these preferences are saved out to the users AppData folder, an example of this path might be</p>
  
  <p>C:\Users[Username]\AppData\Local[ApplicationName][ApplicationName].exe_Url_pduhkwydh2kyq5nkqnr5jbnuaznm\1.1.0.0\user.config</p>
  
  <p>Now, if I am upgrading the application to version 1.2.0.0, the application now defaults back to the default config file and when the user makes changes to their preferences again, a new folder is created this time being 1.2.0.0\user.config.</p>
  
  <p>How can I preserve the user.config when upgrading the application?  I don't know the location of the user.config file during install or where the new user.config will be created.  Is there a better way of storing user settings?</p>