Convert Outlook Express to Thunderbird in easy steps. Converting dbx to thunderbird has become easy with Outlook Express to Thunderbird Converter. Convert dbx to Thunderbird with its items - attachments, formatting, metadata - to, cc, bcc, date, subjects. Download demo of DBX to Thunderbird tool to convert dbx files to Thunderbird. Demo only converts 5 emails of dbx to thunderbird. Get the licensed edition at $49.00 to convert dbx to thunderbird.