Got it! You should also delete the entries from the win.ini file. I got this from http://www.cdrsoft.net/index2.html
CloneCD unblacklist: Some peoples reported me that downloaded
CloneCD 22.214.171.124 where last serial blacklist is not present however registration
not worked, how to make it working:
1.) Download regfix here then run this clicking on it.
2.) Go to your Windows directory and open win.ini file in text editor (notepad or
any other) then remove these information’s:
Save changes, and now you can register using Jim Nelsen serial,
and it will work !