The manual way to change the theme name would be like bellow (the downside: no more automatic updates for the theme).But it would be great if we could change the name of the theme from the plugin, keeping automatic updates. Thanks.
1. Rename the Folder
Connect to your server’s File Manager with an FTP client or cPanel.
Open wp-content/themes folder.
Rename the theme folder.
After installing WordPress, this is the first thing you need to do. Because once you rename a theme, its configuration will reset.
2. Edit Style.css
Open the theme folder and the style.css file.
You can see the theme name in style.css file. Rename the theme in this file as well.
Save the changes.
3. Re-activate the Theme
Go to WordPress Dashboard > Appearances > Themes and activate your theme with the new name.
