use this mu-plugin to add two seperate buttons for export as paid, not paid and all.

filter_attendee_by_payment_status_on_export.php

<?php
function wpmu_bookings_export_filter_by_ps($export_data, $event, $booking, $user_data){

    //if export all then don't bother.
    if(! isset( $_GET['paid'] ) ) return $export_data;

    //check if paid event if yes then proceed other wise return.
    if ($event->is_premium()) {
        
        $payment_status = $event->user_paid($booking->user_id) ? __('Yes', Eab_EventsHub::TEXT_DOMAIN) : __('No', Eab_EventsHub::TEXT_DOMAIN);

        //check what user want paid or not paid.
        if ( $_GET['paid'] == 1 ) {

            //Check if its paid then send paid one only 
            if ($payment_status == "Yes") {
                return $export_data;
            }else {
                return '';
            }
        }else {

            //Check if its not paid then send not paid only
            if ($payment_status == "Yes") {
                return '';
            }else {
                return $export_data;
            }
        }
        
        
    }else {
        return $export_data;
    } 


}
add_filter("eab-exporter-csv-row", "wpmu_bookings_export_filter_by_ps", 10, 4);

function wpmu_admin_inline_js(){
    global $post;

    //check if its events page. no! then return.
    if( 'incsub_event' != get_post_type( $post ) and $_GET['post_type'] == 'incsub_event' ) return;

    $event = new Eab_EventModel(get_post($post->ID));
    if (!$event->is_premium())  return;

    ?>
    
    <script type='text/javascript'>
        jQuery(document).ready(function($) {
            $('#incsub-event-bookings .button').text('Export All');
            var $get_url = $('#incsub-event-bookings .button').attr('href');

            $('#incsub-event-bookings .button').after('<a class="button" href="'+ $get_url + '&paid=1">Export Paid</a><a class="button" href="'+ $get_url + '&paid=0">Export Not Paid</a>');
            
        });
    </script>

<?php }
add_action( 'admin_print_scripts', 'wpmu_admin_inline_js', 100 );