Email Before Download
https://wordpress.org/plugins/email-before-download/
Email Before Download presents your users with a form where they submit information, like their name and email address, prior to receiving a download.
This plugin integrates with the popular Contact Form 7 and WordPress Download Monitor plugins, allowing you to create any form you like and manage/monitor your file downloads.
!!! Můžou zmizet náhledové obrázky, zde workaround
// Around line 182 of wp-content/plugins/download-monitor/includes/class-wp-dlm.php, after this:
$current_support = get_theme_support( 'post-thumbnails' );
// Put this:
if(is_array($current_support[0])) $current_support = $current_support[0];
// Then the code should be like this:
$current_support = get_theme_support( 'post-thumbnails' );
if(is_array($current_support[0])) $current_support = $current_support[0];
