When right clicking in the tree and selecting New DocBook 5 file - I am presented with the wizard. The wizard defaults to a file name of "section.xml".
Any attempt to specify to overtype that field with my own filename results in a popup error window with no text. See attached screen shot.
To get around this I have to allow the wizard to create a section.xml then rename it.
fixed in Release 2014.7.0
fixed in 2014.8.0