Read how to resolve Activation error: Moving a license to another machine.
Licensing system of the product is based on checking on what machine you currently run the product.
We use MZpack Hardware Id for this purpose. This is not NinjaTrader's Machine Id! Read more.
The Hardware Id of your machine is stored on our server at the moment of activation (when you entered the license key and clicked Activate).
To calculate Hardware Id, we use motherboard Id, CPU(s) Id, and your #0 physical drive serial. Changing these hardware parts will cause a license checking error.