http://sourceforge.net/apps/trac/sourceforge/wiki/XML%20export is out of date. The instructions should state the following:
- Log into SourceForge as a project administrator.
- Go to your projects Summary page.
- Click on the Admin tab at the top.
- Click on the Export button on the left.
- Select the items you wish to export.
- Click the Export button to insert your request into the queue.