Free user but still asked what to do???

Systems keep asking what to do???

I have signed up for free using , but even still there is every time a pop up what to do and what to choose?  EM client will end within 4 days… Please help me with this. It’'s about

Hi, your eM client is most likely in demo mode currently, if you’d like to activate the product with the free license you’ve registered for, please navigate to Help > License > Activate, use the activation key received after your registration and activate the product.

Thank you,