I used the Premium page template in a download package after upgrading to the latest WPDM version, and I always get this shortcode at the bottom (on the frontend):
[free_download_btn]
This button appears both when I have no locks on the package, and when I have a form lock. It doesn’t happen in any other template.
To temporarily resolve the issue I edited this file:
/wp-content/plugins/download-manager/src/Package/views/page-templates/premium-package.php
And commented out line 10:
<div class="col-md-5">
[download_link_extended]
<hr/>
<!-- [free_download_btn] -->
</div>
I hope this gets resolved in the next update.