Fix for https://theeventscalendar.com/knowledgebase/change-the-text-for-ical-and-google-calendar-export-buttons/

functions.php

<?php
// From https://theeventscalendar.com/knowledgebase/change-the-text-for-ical-and-google-calendar-export-buttons/
// Changes the text labels for Google Calendar and iCal buttons on a single event page

add_action( 'init', 'tribe_really_remove_action_single_event_links' );
function tribe_really_remove_action_single_event_links() {
	remove_action( 'tribe_events_single_event_after_the_content', array( 'Tribe__Events__iCal', 'single_event_links' ) );	
}

add_action( 'tribe_events_single_event_after_the_content', 'customized_tribe_single_event_links' );
 
function customized_tribe_single_event_links()    {
    if (is_single() && post_password_required()) {
        return;
    }
 
    echo '<div class="tribe-events-cal-links">';
    echo '<a class="tribe-events-gcal tribe-events-button" href="' . tribe_get_gcal_link() . '" title="' . __( 'Add to Google Calendar', 'tribe-events-calendar-pro' ) . '">+ Export the Map </a>';
    echo '<a class="tribe-events-ical tribe-events-button" href="' . tribe_get_single_ical_link() . '">+ Export to Calendar </a>';
    echo '</div><!-- .tribe-events-cal-links -->';
}