[@arthur]
Sorry to hear that the registration is not successful.
The giveaway license key is valid. Could you kindly have a try again?
Please keep in mind that there should be no spaces in front or at end of the key, otherwise it will not work. And please make sure you have proper Internet connection when registering Winxvideo AI.
If there is still any question, please contact us at [email protected] for further assistance. Thanks!