Support Start > Managing Your Web Site > FTP Publishing > Settings for Common FTP Programs > Dreamweaver > Copying Dreamweaver Files from Your Web Site

If you use Dreamweaver to manage your website, but you no longer have a copy of the files on your own computer (because you've switched to a new computer or lost the files somehow), you can copy them from our servers back to your own computer.

The “bring existing websites from a remote server to your local site root” page on the Adobe help site explains how to do this.