Do I need to install a second time?

I had NIS installed as trial on my new computer. I just had corrupted file fixed by Norton and NIS is running fine. Consequently I just renewed for 2 years and all that shows up in my account. I was a little confused however by the recent Norton E-Mail thanking me for my purchase and having a "let's get started" link.  It makes it seem as if i have to reinstall because I made the purchase. Can I assume I need to do nothing since my account shows the renewal 2 years out and NIS is running fine?