Filename extension when using Convert Here

I have a PDF Creator print profile which I use regularly and successfully from within Office programs such as Word. The created files simply use the same original filename but with the .pdf extension (obviously) instead of, say, .docx.
However, when I use the Windows Explorer context menu item "Convert here" on a Word document (and applying the same print profile), the resulting file will be named "[filename].docx.pdf".
How can I adjust the settings so that the ".docx" is removed from the output filename when using "Convert here"?