VOCALOID4 and earlier version of Editors / Voicebanks cannot be authenticated / deauthorized with "VOCALOID Authorizer".

VOCALOID Authorizer is a dedicated application for VOCALOID5.

The authentication and deauthentication methods before VOCALOID4 are summarized on the following page.

Check the authentication / deauthentication method according to the type of software and the OS being used.

- Activation (Authentication) of VOCALOID Products
https://www.vocaloid.com/en/articles/online_activation

- Deactivation (Restoring Authentication Information) of VOCALOID Products
https://www.vocaloid.com/en/articles/online_deactivation