How to change URL of websites in my dashboard?

Hi.

Can you tell me how to update the URL of sites in my dashboard? I need to update some from their development URL to live URL. I wondered if the Hub would update automatically to the the URL when I updated the settings in WP Admin. When this did not happen on another site, I tried removing the site from my Hub dashboard so I could add it again. However, when I try that I get the message that it cannot find a new site.

Any help you can give would be appreciated. Many thanks.

Andrew