First, take some moments to browse the File Workbench Wiki, there is plentiful of docs there.
Try the Messages tab above. You can start a discussion there.
If a question is not resolved with the Messages forum, Use the Trac tab and make a ticket with your bug report / patch / feature request.
For other questions or when above doesn’t work, use this email address.
This includes questions around using FWB sources in other apps.