This must sound stupid, but how do you update ConTeXt via the command line on Mac OSX? I'm using the MacTeX distribution and Mac OS 10.4.10. I tried (foolishly) to install the newest version of ConTeXt using i-installer, but that screwed up my current installation, so I was wondering if I could overwrite it with a new version. Step-by-step instructions would be very much appreciated! Thanks in advance for your patience and help!

-Alex