Searching for a "winx dvd copy pro license key" on dodgy forums is like walking through a minefield to save $30. You might get lucky, but the statistical likelihood is that you will infect your PC with malware, waste an evening troubleshooting a blacklisted key, and still not have your DVD backed up.
Install the software. During installation, uncheck any "optional offers" (like toolbars or additional software) if you don't want them. winx+dvd+copy+pro+license+key
The developer, Digiarty Software, states that the tool is intended for personal backup under "Fair Use" principles. Alternatives for DVD Backup Searching for a "winx dvd copy pro license
: Clones discs with original video/audio quality, menus, and subtitles intact. and subtitles intact.