If you are running the Demo version, a "Please Register" window should appear at startup. Access the Registration Menu: If the software is already open, go to the menu and select Fill in Details: Enter your (use "Personal" or "Home" if not a business). Paste the Key:
Warning: Never attempt to type the key manually, as even a small mistake will result in an error. 3. Online vs. Offline Activation r-studio key registration