Just saw that you need to have Advanced TinyMCE button installed, which I did previously. So I installed that, did the tests that I previously mentioned, and the shortcode you provided still isn’t working.
Scratch that, I need to get this working because I need to modify the text called by <?php $package = wpdm_get_package($post->ID); echo $package['download_link']; ?> which is what I was previously using.
I’m using the latest version of WordPress and the latest version of WP Download Manager. Any idea why it wouldn’t be working?