Open Source Document Management System | OpenKM

Does OpenKM support Microsoft Publisher file format for document preview and download to PDF? I uploaded a Publisher document (.pub), but when I select it, the preview window says "Preview Unavailable" and the download to pdf icon in the tool bar is greyed out. Excel and word Documents work.

OpenKm 6.3.2 Community
LibreOffic 5
Server 2012
Installed using the Community Windows Installer

The philosophy of the previewer is converting documents to a previsualizable format ( the most common is PDF ). The question here if it's possible to convert .pub files to pdf from command line ( in case afirmative, then will be able to previewing this mime types into OpenKM with minor source code changes ).

Note better if the conversion is from command line rather making internet call to website services etc...