Absolutely! If you haven't created your account yet, go ahead and set up your profile and change the email address by following the steps below. If the email address you see on the profile set-up page doesn't belong to you, ask one of the leaders to send a new email invitation to the correct email address.
If you have already registered, you can edit your email address by going to "My Profile" in the top right corner, choosing "My Profile" from the drop-down menu, and typing your new email address over the old one. Choose "Save Profile" towards the bottom of the page.