One of the members of the JKI team just pointed me to the new version (2.5.2798.17141) of XML Notepad. The major improvement is performance — it’s MUCH faster! The old version was pretty clunky (although, very feature rich and easy to use).
This free tool from Microsoft is very useful for editing and debugging XML when you’re working with XML data in LabVIEW (which doesn’t have to be hard). Give it a try, and you’ll be happy that you did.