Ok, my trial version of NIS09 has expired. When I click the "buy now" button, it brings me to a web page where I can buy the product for $69.99. However when I first installed the product I had to create an account in the Norton my account site. When I log on there, it says I have the trial NIS09 as an active product and an option to buy a key. When I click on that, I can buy a key for only $49.99. Is there any difference between the two options? It says the key is good for three installs as well.