File Download Link – can't download anymore

Hi,

A client has approached me regarding their website on which WPDownloadManager is used. Previously they have uploaded a file for which they provided links to their customers to download files.

The problem is whereas the plugin generated file download URLs like:
http://www.theirdomain.com.au/download/test-file-1/?wpdmdl=1111&ind=asjMrqXhsvuiyXXZi0Cc0qwNHYQA6Kv2YPmwLlPfX4rKba14qFOuQa2bhbqj35_fJ5_5oB-Mf9eMQMkULGvto1u0AJR6oXuhjC1WIBtVhJqOu35Owe3hWEJUoxKXfhz

… they truncated the file download URL before giving it to their customers:
http://www.theirdomain.com.au/download/test-file-1/?wpdmdl=1111

Previously these truncated links worked for everyone. But now these truncated links only work for logged in users and not for general non-logged in visitors like it did before. I’m assuming the ind parameter is some kind of unique key. If a visitor visits that truncated link, they get a blank empty page, no error message.

Since it looks like they have 100’s of these file download links provided to their customers, how can I get the truncated links to work again for non-logged in users again, like it used to about a month ago please?

Thank you.