Your should have received your license credentials via email from the address contact@marui-plugin.com.
If the email did not arrive, please check your spam filter, or contact us at support@marui-plugin.com.
Please use the user name and password you received with your subscription as authentification to download VCAT.
If you have lost your user name and password, please contact support@marui-plugin.com.
Documentation on how to use VCAT is available at https://www.marui-plugin.com/documentation-vcat