MailChimp Opt-In (email address + First Name?)

Hi guys!

This weekend I’ve installed Total, which I find amazingly customizable!

I am trying to add a (MailChimp) Signup Form using the WP Bakery that has the option to include First Name as one of the fields. But the Add Element > Mailchimp Form just offers the Email field.

Is there any workaround to add the First Name field to the MC form?

Thanks for your time…
Cheers!
Marc