Also there's some kind of error message in red that says my wallet is out of sync. Uh... okay? How do I get my wallet "in sync?" Take it to a Justin Timberlake concert?  There'sno "fix this" button. How do I fix this?

There's some kind of progress bar at the bottom that seems to be doing something, and now my computer is chugging like an asthmatic pensioner running uphill. What is this?