How do I switch from the Trial to my Commercial or Educational license inside Cinema 4D?

In the Cinema 4D License Manager all you'll need to do is hit the "Switch To" button on your available license. You will then be prompted with a window asking you to confirm the switch; you will hit "yes". At this point you should now be using your commercial or educational license. Finally, hit "OK" at the bottom of the Cinema 4D License Manager, and start creating!

If you are not prompted with the Cinema 4D License Manager during launch, you can access the Cinema 4D License Manager by going to Help > License Manager in the Cinema 4D Toolbar.