GCCG does not use .app files, otherwise everything would be encapsulated into one package.
UPDATE: For some reason my windows machine (using temporary name tempCBB) can pull the xml files from the server, and my mac os x machine can't. And both are on the same network, so in theory the issue is with a firewall or security setting of some sort. Funny, I tried disabling the firewall, or opening the port range 29100-29700, etc. There is just something out there I'm not doing that has the magic touch