How To Align Center Forms

We have a “Sign-Up for our email” form on our home page. However, it is not aligned centered like the rest of the page (it is staying aligned to the left). Does anyone know how to fix this? For reference I am using the Form Maker plugin by 10Web Form Builder Team.

I would like the form to be aligned centered with the rest of the text on the Home page.

The page I need help with: [log in to see the link]