trouble entering activation key for free emclient

I was using the free demo and then signed up for Free EMclient. However, it will not let me into my email until I enter the activation key. I received the activation key, but cannot get back to a screen to enter the key. Can you advise where and how I can enter my activation key? Thanks!

I guess it should be Help > License.

Hi Lisa, just as Hans suggested, please go to Help > License > Activate, and enter your activation key, confirm your key and you should be immediately able to start using the application.

Hope this helps,