In the lower part of the main application window, click the area, which displays information about the license and the key.
In the lower part of the main application window, click the Support button and in the Support window that opens, open the License window using the link in the Key field.
The License window opens. Clicking the Purchase a license button in this window opens the Kaspersky online store, where you can purchase a license.
You can use the application under a trial license for only one trial period.
After adding an active application key, you can add a reserve key and, if required, an EDR Optimum add-on key. To start adding a reserve or add-on key, use the Add button in the upper part of the License window.