Online License Activation
Online activation requires Internet connection. Click “Activate online now”.

Now the registration is in process.

In case the activation is successfully finished, the following window will appear. Click “OK”.

Now you can see the “Activated” status of your component in the “License Manager” window.

Note: after activation you must restart IIS and Windows SharePoint Services Timer.

You can use Command Manager commands:
iisreset
net stop "Windows SharePoint Services Timer"
net start "Windows SharePoint Services Timer"