Norton 360 or Norton 360 Multi-Device - renew subscription questions

 

At present I have Norton 360 Premier Edition.I would like to know the renew process with the following software.

 

1.  Norton 360 -  key the code for the renew on the screen.

 

2. Norton 360 Multi-Device - should I uninstall and install the software or can I key the code for renew on the screen.

 

Windows 7 Home Premium x64 SP1, IE 11, Norton 360 Premier Edition 21.3.0.12

please advice how to renew my subscription.

thank you

rao