Newbie unable to set up Norton Family. How to reassign pc to me?

Got the program yesterday. By mistake I assigned the family pc to one of my children. Now, using the pc, I cannot set up Norton Family and even though I have read and re read the help section, can't find how to assign the pc back to me (the parent). I don't have any Norton Family logo and no menu with edit account so I'm blocked.

Do I need to uninstall and reinstall? He is assigned to the administrator account on Win10.

Thanks!