Digital File Pro is bundled into Universal Email 4 under the File Manipulation menu.
the Universal Email File Manipulation -> File Upload behavior is exactly the same as the Digital File Pro -> Upload file Behavior, only the name "Digital File Pro" has been changed to "File Manipulation"
the WA Upload Files ([file field name]) binding referenced in the tutorial will still exist in the bindings panel. The WA_DigitalFilePro/HelperPHP.php file has been moved to webassist/file_manipulation/HelperPHP.php