Go to the AMD website and download the App for removing the AMD video drivers. (simply uninstalling them from Windows doesn't get everything) https://www.amd.com/en/support/kb/faq/gpu-601
Be sure to install the current Nvidia drivers. You can Download the "GeForce Experience" from Nvidia to make this easy. Also please note that Nvidia offers the "Nvidia Studio" driver if you are primarily doing video editing as oppose to gaming.
Then uninstall PowerDirector. Download and re-install PD.
For Windows 10, go to Settings/ System. Then Scroll down to "Graphics settings" and click it. Activate "Graphics-accelerated GPU scheduling". Under "Graphics performance preference" click the box titled "Choose an app to set preference". Select "Desktop app".
Click "Browse" and find the PDR.exe file and click it. (most likely in - Program Files/ CyberLink/ PowerDirector20). PowerDirector 20 should now show in "Graphics settings". Click the PowerDirector icon and an "Options" button will appear. Click it and you should see "GPU: NVIDIA (and whatever card you have). Choose which ever setting you prefer. I chose "High Performance". Click "Save".
If you have the NVIDA Control Panel installed you can follow the same procedure with "Browse" to add it to the "Graphics settings" Window.
Be sure to set Hardware Encoding in PD Settings as well. And now I have hardware encoding with my new Nvidia card.