Restoring license

When I have installed eM Client for the first time, I have bought a License (including support).
Now I had to reset computer totally and to reinstall eM Client.
But eM Client cannot refind this license and tells: No License found, sending emails (and others) is blocked until the license is installed.
How can I do this?

If you go to and enter the email address you used to purchase the license, the activation key will be resent to you.

Then in eM Client go to Menu > Help > License, click on activate and paste the received key.

Thank you … success!