There are no separate trial builds of MindFusion assemblies. When you purchase a component you can find the license key for this component listed on the Keys & Downloads page at the customer's portal. Assign this license key to the LicenseKey property to disable the component's evaluation mode and stop displaying trial messages. If your application contains more than one MindFusion component, you could call MindFusion.Licensing.LicenseManager.AddLicense(key) method from application start-up code to specify the key once instead of setting it per each control.