No, css form builder does not include the refresh button.
you would need to replace the captcha from form builder with the one from Form Toolkit.
Delete the captcha element from the form, then add a new one from Form builder.
In the server behaviors panel, double click the server validation server behavior, remove the existing Lie Entry Validation for the captcha form element, and add a new like entry validation for the form toolkit captcha element, instructions for configuration the like entry validation are in the form toolkit getting started guide.
