Upgrade from NIS to NS - Recommended method?

Hello

I am planning to upgrade the family's machines from Norton Internet Security ( NIS ) to the new Norton Security product.

I don't see much data on recommended upgrade method in the Norton Security manual...

Can I do an "overlay" install?

Or should I remove NIS, then run the norton cleaner, then install NS

Or is there some other method that is preferred?

THANKS for any help!