After looking for the old File Upgrader Batch Utility for 2013 and not being able to find it - I found that it is no longer supplied on the disks or memory stick but can now be downloaded off the Autodesk Exchange Apps web site
"File Upgrader will batch upgrade previous versions of Revit files to the Revit 2013 format. The tool is intended to help upgrade family contents, template files as well as project files. Every time users open a Revit file which was saved in a previous version of Revit, a standard dialog is displayed in the Revit user interface stating that the file is being upgraded. During the display of this dialog, Revit tries to upgrade the document to the current version. This slows down the process of opening a file. To save time opening older file versions during each of the subsequent attempts to open the file, users can manually open each of the Revit files and save it to the current version. This can be time consuming if there is a large set of files to upgrade across various folders and sub-folders. The File Upgrader tool saves time and manual labor by automating this process. The plug-in has been provided with the complete source code needed to build the application, with the intention of encouraging users of Autodesk software to use programming to tailor the products they use to their specific business needs."
HTH - Alan