[Plugin: Contact Form 7] Changing URI to URL in Contact Form

Very simple request.

If you look at the contact form here:
http://www.audiomind.us/blog/2009/08/19/the-new-physico-mechanical-human-challenge/

When it ask for a web address, it stipulates URI. I cannot find the file where I want to make the change to URL or something like that.

Thanks.