Adds an action to the order page that allows you to regenerate download permissions AND extends the expiration date for WooCommerce downloads.

wc-regenerate-and-notify.php

<?php
add_filter('woocommerce_order_actions', 'wc_regenerate_and_notify_custom_order_action');
function wc_regenerate_and_notify_custom_order_action( $actions ) {

	// Remove the woocommerce option to regenerate to avoid confusion
	unset($actions['regenerate_download_permissions']);

	// Add our new action (executed below)
	$actions['wc_regenerate_and_notify'] = __('Regenerate permissions & send link to customer', 'wc-regenerate-and-notify');
	return $actions;
}

/**
 * We need to do 4 things:
 * 1) Reset the download counter
 * 2) Reset the download expiration date
 * 3) Send order confirmation (again) with the download links
 * 4) Add a note for recording purposes. *
 */
add_action('woocommerce_order_action_wc_regenerate_and_notify', function($order){

	// 1)  Reset the download counter
	$data_store = WC_Data_Store::load( 'customer-download' );
	$data_store->delete_by_order_id( $order->ID );
	wc_downloadable_product_permissions( $order->ID, true );

	// 2) Retrieve Download and remove the access expiration. (Our poor customer has had enough trouble)
	// *Could optionally reset to product default (x days or whatever)
	$downloads = $data_store->get_downloads(array('order_id' => $order->ID) );
	if(is_array($downloads)){
		foreach($downloads as $download){
			$download->set_access_expires(null);
			$download->save();
		}
	}

	// 3 & 4) Yay! Send an updated invoice to the customer with this message:
	$order->add_order_note( __( "We've reset your download permissions. Please try downloading again.", 'woocommerce' ), true, true );
});

Hi Bdaley,

Thank you for the quick response.

I am getting this error when trying to activate the code:
**The code snippet you are trying to save produced a fatal error on line 0:

Exception thrown without a stack frame**

Any idea where am I going wrong?

I really don't know anything about using code snippets and whether or not they work with wordpress actions. Your best bet is to add all of the code to your functions.php file or use the plugin version.

You would just need to change this line, using the code from my last response.

https://github.com/bdaley/woocommerce-regenerate-and-notify/blob/afaeda5f9c498f51018eaa77065951e415811b5a/woocommerce-regenerate-and-notify.php#L75