Contact form submission type in Contact Form Extensions
You can override the form name by adding a hidden field to your form like this:
&lt;input type=&quot;hidden&quot; name=&quot;message[formName]&quot; value=&quot;myFormName&quot;&gt;

Set the value of the hidden field to a unique value for each different form that you have on the site. Then submissions to each form will then be indexed in the control panel by the different values used for the hidden field.
Full documentation for the Contact Form Extensions plugin can be found here: https://github.com/hybridinteractive/craft-contact-form-extensions/blob/master/README.md
There's currently no native way to export the submissions to a CSV. There is a GitHub issue open for this (https://github.com/hybridinteractive/craft-contact-form-extensions/issues/13) which includes a suggested work around using a Twig template to handle the exports: https://github.com/hybridinteractive/craft-contact-form-extensions/issues/13#issuecomment-518668747