Subscription problem.

NAV 11.x is now prompting me to purchase a new subscription. If I go ahead, and do this, I'm assuming that the "license" will be downlpaded onto my computer, in some hidden location, and will allow me to get NAV updates for another year. My question / problem is this: How do I reinstall NAV, and get the rest of the year of updates (that I just purchaed) when I reformat my machine?

 

Thanks!