Can't participate in CB? o.O

[Blaaaaaaaah]

My sister just started playing Fiesta today, and everything was going well when she suddenly got disconnected after trying to get into Forest of Tides (she's already went there before, so it shouldn't be the map problem or anything).

Anyway after she got disconnected, she tried to start it back up (also after restarting her comp), but when she tries to log in, it says she's not authorized to play closed beta. O_O Also, in the log in screen, you know how there a Loading pic that goes around and around? That thing freezes as well, meaning the whole login thing probably froze or stopped working.

I want to try uninstalling and reinstalling but I don't know which file is the actual full client. =/ Because when I click the .exe file I downloaded and install that, I have to download the whole thing again (that's another 600mB!!). Soo.. anyone know which file lets me reinstall without having to download everything again?

Or anyone know another way to fix this? Thanks in advance.