Hi, Han. My name is Catherine. I am a MacKeeper Community Support representative. I see that you feel confused. I am sorry about that. Let me clarify a few things for you. In 2016 you purchased 2 licenses. The first license (lifetime) was for the service called Remote Assistance. They deal with technical problems and can cover a few devices. The second license (subscription-based) was for the MacKeeper application, which helps to optimize your Mac, protects it from viruses, stops ads, secures your online computer usage, and so on. These two the technical service and the MacKeeper application are separate things, that complement each other. If you cancel your subscription to MacKeeper, you won't be able to use this application anymore. Unless you re-subscribe.