: If you have a serial number but no key code, you likely need to register your software first. You can do this at the Pro-face Web Registration page to receive your code via email. : Fully functional licenses (Model No.: PFXEXEDLS3X

To activate licenses like GP-Viewer EX or Remote PC Access on a physical HMI, you must enter the key code in the unit's .

If you already have the installed, you can upgrade it by going to Help -> Key Code and entering your credentials. HMI Unit Activation (GP-Viewer EX / RPA) :