In other words... post in the appropriate spot, not one of the first that you come to that "looks right".
But to answer your question... yourdomain.com/admin.php
Yep... a common occurrence.. and, since I haven't bought a license in a LONG time, it REALLY needs to be emphasized on the purchasing process page how to do this. I don't think it was really emphasized when I got my licenses in 2012. Anybody want to pay for a new license for me to check again? I need ALL the 1st party add-ons enabled!