Removes decimal places from all prices
<?php
/*
 * Plugin Name: Easy Digital Downloads - Remove Decimals
 * Description: Removes decimal places from all prices
 * Author: Pippin Williamson
 * Author URI: https://easydigitaldownloads.com/
 * Version: 1.0
 */
 
function pw_edd_remove_decimals( $decimals ) {
 
	return 0;
}
add_filter( 'edd_format_amount_decimals', 'pw_edd_remove_decimals' );
To implement this snippet on your site, create a brand new, empty WordPress plugin and paste the above code inside.