How to switch licenses without loosing settings in app?

I have a PC that is using a "Norton 360 Deluxe" license that is about to expire and I want to switch the license on this PC to one of the unused licenses of my 360 Platinum plan - but I do NOT want to loose the current settings of the app.

How can I do this?

Thanks

This worked - thank you!

Enter Product Key from the 360 Platinum plan. 

Enter Product Key.png