What Phil said. DPP is a free download.
Here you go, here's the URL to make it easy:
http://support-au.canon.com.au/conte...200251701.html
Go down the bottom and tick the box saying you understand blah blah blah and then download.
You need to have a pre-existing install of DPP on your machine for that update to work. If you don't, let me know, and I can send you a link on my site where I keep a resident copy of the disc.
H