Download connection

Hi,
I have a customer's site with Formidable pro plugin installed.
The customer wants to add a field to Formidable export files from other plugin.

To be more precise, every visitor that filled a contact from and then downloaded a file from the site (using downloads plugin), my customer wants to see what files did he download. This data is stored in WordPress under the user details.
Can you guyed me which files should I use to add this data to your "regular" export files?