To edit a campaign that is currently public/live, follow the steps:
Within your account, go to Fundraising > Active Campaigns.
Click the cog icon at the top right of the campaign that you are trying to edit. Select the "Edit" option.
3. Go through and make the desired edits to your campaign.
4. When you are done, click on the "Publish" button located at the bottom right of the final page.
Your edited campaign will then be re-published and live for donations!