This is an elementary question, I'm sure. A couple of weeks ago I downloaded Silver Stripe and began building a site. Everything was fine; I could work in the CMS no problem. Today, when I tried to get into the CMS I was faced with a log-in request, asking for my email and password. Uh, it's on my computer, but I cannot get in. I do not recall ever being asked for those details. What do I do?