I formated my computer but in the new installation I have reached max licences 3. How can I deactivate one?

Hello Luis, if you’re a PRO license user you can access our licensing system using your credentials at http://licensing.emclient.com/ and manage your licenses or activations. If you need to deactivate on one of your devices (or one of the past activations), click on your license and select the “Activations” tab to deactivate.

To login to the licensing system use your licensing credentials that should be included with the license registration details you’ve received with your activation key.