Original Source: https://support.wix.com/en/article/accessing-your-editor
Access your site's Editor any time you want to make changes to your site's content, design, themes or pages.
After making your edits, make sure to publish (even if your site is already live) to make the changes go live.
Trying to edit a different site?
You may have more than one site in your Wix account. Click the Site drop-down at the top left of your site's dashboard to switch to another site and access the Editor.
Learn more about managing multiple sites in your account.