Double Click the Freeway icon to launch the program. In the menu bar select File > Document Setup.
You will then be presented with another window. Click on the Upload tab. In the Server: drop down menu, leave FTP. In the Server field, type the Host Server name as listed in the email with the subject line "MacHighway New Account Information". In the Directory: field, type /public_html/. Enter your FTP username and password into their respective fields. Check Passive FTP Mode (PASV) and click OK.
Once you're ready to upload your site, go to the File menu and select Upload... Your site will begin to upload.
You can download a copy of Freeway here
Note: If you would like to connect via SFTP, you would connect using port: 22222