The message "The trial period has expired. Please register the product" appears and DJS will not start up.

DJS will not run when the trial period has expired. [Reference] DJS runs in trial mode after installation. Trial mode means that the registration ID has not been entered in DJS and that it is running in trial mode. DJS can be run in trial mode for up to 60 days. When the trial period elapses, you will not be able to use DJS any further. To exit trial mode you will have to register the product and enter the registration ID issued. --> For details, see Chapter 11 on page 131.