https://github.com/pippinsplugins/Easy-Digital-Downloads/issues/387 (not tested)

gistfile1.php

<?php
/**
 * Get Users Purchases
 *
 * Retrieves a list of all purchases by a specific user.
 *
 * @access public
 * @since  1.0
 * @param  int|string $user   User ID or email address
 * @param  int $number        Number of purchases to retrieve
 * 
 * @return array List of all user purchases
 */
function edd_get_users_purchases( $user = 0, $number = -1 ) {

	if ( empty( $user ) ) {
		global $user_ID;

		$user = $user_ID;
	}

	$purchases = get_transient( 'edd_user_' . $user . '_purchases' );

	if ( false === $purchases || edd_is_test_mode() ) {
		$mode = edd_is_test_mode() ? 'test' : 'live';

		$purchases = edd_get_payments( array(
			'mode' => $mode,
			'user' => $user
		) );

		set_transient( 'edd_user_' . $user . '_purchases', $purchases, 7200 );
	}

	// no purchases
	if ( ! $purchases )
		return false;

	return $purchases;
}