[Sticky] Where do I put in my registration for pro?

Hi, I downloaded the free 32bit version for Notepad++ and then went in and paid for the N++ single user license.  But I can't see where to put in the registration information from the email.  Is it somewhere on the website or is it somewhere in N++ itself and the plugin?  It's the pro version additions that are really good and fit my sql style, but I can't see how to get out of the free version to the full version.