There seems to be an issue with the Save and View button in the LOB Viewer. When using this icon, if I try to save the file with an xml extension it should open it up and let me view it as an .xml file. Instead we get an error stating XML page cannot be displayed. Body of error page says 'name started with an invalid character. Error processing resource 'file ///c:/documents and settings/etc'.
The issue is the encoding is utf8 and there were changes made in v6.x which provide the ability to save unicode format which breaks this.
Waiting for fix to be released in a future version of SQL Navigator.