You are correct! You simply re-publish the website using FTP in the iWeb settings. Please reference this link for complete instructions on how to publish your site via iWeb:
Publishing with iWeb
Note that your FTP login settings (used in the iWeb), can be found by logging into your Account Management Panel (AMP), and then going to the Account and Billing - DETAILS, then select Details again (under Admin int he Active Subscriptions list). Your password will normally be the same as your AMP password, unless you have changed it. If you have any difficulty with logging in, please contact technical support or leave a comment for this post.
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