Woocommerce checkout text removal

I’m currently building a new site using woocommerce for the shop part of the website,i have installed the woocommerce checkout manager plugin to remove unwanted fields from the checkout page. However this leaves

Billing Details
Additional information
Example Label
Ship to a different address?
Your order

on the checkout page, i want to remove this information, i have been told i can find it here

Navigate to your file manager to WP-Content > Woocommerce > Templates > Checkout > form-billing.php, and all i need to do is carefully remove the words from between the “. However i cannot find this file, i am using windows 8.1. Any help would be much appreciated.