If you have performed the user registration procedure, check your license key [here] (https://register.pioneerdj.com/info_user.php "").
If you are not sure whether you have performed the user registration procedure, input your e-mail address [here] (https://register.pioneerdj.com/reminder_password.php "") to check whether or not you have registered.
Inquiries can be made using the mail form provided on the rekordbox Support Site. Also, your License Key can be sent to you if you lose it.
Please double-check that your license key was entered correctly. Make sure that you use hyphens when entering the license key. We recommend copying and pasting to avoid any errors.