Firefox Problem:Switching Profiles?

[Syterion]

I closed Firefox today, and when I tried to reopen it, a box appeared demanding me to select my profile. I tried to choose the default but it said it was in use. So I created another so I could use the net, but now I can't switch it back. All my saved bookmarks, settings, and extensions were there.

Anybody know how to get out of this?

EDIT: Never mind, I fixed it. Sorry. A mod can close this.