A lot of configuration files are in xml format. You can edit this file using any editor like Notepad or Word. As an alternative, there is a nice freeware tool for xml files which you can download here.

 

http://www.snapfiles.com/get/xmlnotepad.html

 

Start the XML notepad and select File, Open. You will see the XML file content which is structured. The content can be easily modified and saved.