Change Submit Button

Hello
I actually purchased the pro version of this but cannot find my login info for your support website so I am coming here for help.

I am trying to change the submit button background color but cannot find it anywhere. I see in another post you mention to add this CSS to the theme (see below), but that didn’t work, and it seems like a crapload of code just to change the submit background color. Any ideas on how to do this?

Code you suggest using from another support post:

#wrapper div.wpforms-container-full .wpforms-form input[type=submit],
#wrapper div.wpforms-container-full .wpforms-form button[type=submit],
#wrapper div.wpforms-container-full .wpforms-form .wpforms-page-button {
background-color: #e02945;
border: 5px solid #fff;
color: #333;
font-size: 1em;
padding: 10px 150px;
}

#wrapper div.wpforms-container-full .wpforms-form input[type=submit]:hover,
#wrapper div.wpforms-container-full .wpforms-form input[type=submit]:active,
#wrapper div.wpforms-container-full .wpforms-form button[type=submit]:hover,
#wrapper div.wpforms-container-full .wpforms-form button[type=submit]:active,
#wrapper div.wpforms-container-full .wpforms-form .wpforms-page-button:hover,
#wrapper div.wpforms-container-full .wpforms-form .wpforms-page-button:active {
background-color: #f34640;
border: 5px solid #fff;
cursor: pointer;
}