I -did- use the . in the first command but It's still downloading the whole 6GB again!
Guess I can't stop it now and have to wait :/
Try pressing ctrl + c repeatedly in the console. Should break any active commands.
If you feel adventuerous and want to learn something new, try "ps -ax" then look for the pid (process id) of your update script and kill it with kill -9 <process id>.