MonoReport demands properly installed license. This is simple process described step-by-step bellow.

Step 1: Get file with product key

By default MonoReport license file ("FogSoft.MonoReport.Free.lic") for the free version is in the installation directory.
After you buy MonoReport you will receive product key by email. To generate license file with the key you should run program "License File Maker" that is installed together with MonoReport. You can find the program in the root installation directory or access it through menu Start | Programs | FogSoft MonoReport | License File Maker. Enter the product key from the email to the "License code" text box. Specify path to the directory in the "Output folder" text box. Press "Make" button.
The license file ("FogSoft.MonoReport.lic") will be saved to the output directory.

Step 2: License MonoReport in your application

Add your license file as embedded resource into your application project which refers to MonoReport. That's all!