non-functional
Never was able to open an xml file. I tested with my iTunes library file and the app reported that the file was corrupted.
In addition to what Steve 3000 noted, clicking on the support button within the app takes you to a JSON support page. Initial content prompt says "To test raw json string", which is an entirely different format from XML. Feels like the author has confused a couple of his applications? The "Visual XML Support" link on this review page takes you to a developer page, but there is no mention of VisualXML app there.
Suspect that this app was not tested very well prior to uploading.
developer13 about Visual XML