To edit your fundraiser and photo, simply login to our site and go to your personal dashboard. There you will see your project with a link to the left of it which says 'Edit'. Go ahead and click this to edit your project.
Go to step 3 and you will see a field which says 'Upload image'. Browse and select the new image that you would like to use. Once selected, scroll to the bottom of the page and click 'Save & Continue'.
For optional images, you'll need to do the same thing but click the 'Edit Optional Image(s)' link to see the optional fields.