How to strike off text in wp plugin voucherpress after downloading

I am using wp plugin voucherpress Here i create one voucher and set downloading limit to one. And i placed the [shortcode] on page which create downloadable link.When user downloads the file once(as limit to download file one is reached) plugin start showing error by redirecting to next page.

So is there any way to strike off or highlight the link which is already downloaded once so that users can understand that file already downloaded once

via Chebli Mohamed