After purchasing MERCUR Messaging, you will receive a license number which will make your MERCUR fully registered. This license number must be entered in the MERCUR configuration.
Open the MERCUR configuration utility and select the dialog License. Use the Add button and enter the license key. Save your changes with Apply.
For the MERCUR LITE Edition, please continue as follows:
Open the MERCUR configuration utility and select Enter License Key out of the menu Help. Close this dialog with Ok and save your changes with Apply.