1. Log into your WordPress admin panel.

2. Navigate to Appearance – > Themes and deactivate your current theme. You can achieve this by activating any other/default theme:

3. Access your server using any ftp software or FileManager provided by your host.
4. Navigate to ‘wp-content/themes’ directory on the server:
5. Rename the theme folder:
6. Get back to your WordPress dashboard and navigate to Appearance -> Editor menu.
7. Select your theme to edit and click ‘Select’ button:
8. Open ‘style.css’ file:
9. Change ‘Theme Name’ value to your new theme name. Save the changes:
10. Get back to Appearance – > Themes menu and activate your theme. Activate your parent theme first (CherryFramework) and then activate the renamed theme.

Feel free to check the detailed video tutorial below:

Source: templatemonster.com