Default to use the config file in user profile

src/Common/Helpers/TwoFilesConfiguration.cs

@@ -616,7 +616,7 @@ static ConfigFileUse GetConfigFileUseValueIgnoringCache(string userConfigFilePat
                     ConfigurationParameters.ConfigurationConfigFileParameter, resultStringApp, typeof(ConfigFileUse));
             }
 
-            return ConfigFileUse.ApplicationConfig;  // Default to Application for backwards compability
+            return ConfigFileUse.UserConfig;  // Default to User file for better performance
         }
 
         static ConfigFileUse AquireConfigFileUseValue()