Major graal error....

[oo_jazz_oo]

Ok, so, I'm on graal minding my own business, so, I want to see what the tileset name is of the level i'm in.
So, I press f2 and go to files.
My screen freezes for a few seconds, and theres thousands of lines of weird symbols and all kinds of stuff.
So, I just close it out. Now, every 10-15 seconds graal freezes for 15 seconds.
So, now I cant play....Is there anythng that would have caused this? x.x