Installing NIS on New Computer

I want to install NIS on newly purchased computer. Have NIS with 3 licenses & want to install it on newly purchased computer. After reading similar posts, they all refer to using Norton Management, which I haven't used.  Originally installed NIS on 3 computers in 2010 & 2011. One is long gone, one is being replaced now, and I'm using the 3rd one. Just renewed subscription mid-March.

 

I was able to delete 2 of the unused computers from My Account/Account Details without going through Norton Management, and it now shows 2 seats available.

 

Can I just download NIS to the new computer and enter my license code? Or is it more complicated than that? Thanks!