I first ran GE from the desktop in OS X, which worked fine. I then moved it to the Application folder. When I would open it, GE would not load the group files and would then crash (the message: Group Explorer quit unexpectedly) after double clicking in the blank program window. I tried the solution you gave on the service request page, that is, I removed the group and sheet paths from GE while it was on the desktop, and then moved GE into the Application folder. It worked. I don't know if it makes a difference, but I should mention that I run OS X as a standard user, not an administrator.
GE works now, but this might be a bug, so I thought I'd let you know. Thanks very much for GE!