[Plugin: WordPress Download Manager] Broken in WP 3.4

Plugin works well in WP 3.3.2, but in WP 3.4 when pressing a download button it simply reloads the page. There are errors in debug mode:

Notice: wp_enqueue_script was called incorrectly. Scripts and styles should not be registered or enqueued until the wp_enqueue_scripts, admin_enqueue_scripts, or init hooks. Please see Debugging in WordPress for more information. (This message was added in version 3.3.) in .../wp-includes/functions.php on line 2825 Notice: wp_enqueue_style was called incorrectly. Scripts and styles should not be registered or enqueued until the wp_enqueue_scripts, admin_enqueue_scripts, or init hooks. Please see Debugging in WordPress for more information. (This message was added in version 3.3.) in .../wp-includes/functions.php on line 2825 Notice: Undefined index: page in .../wp-content/plugins/download-manager/download-manager.php on line 725 Notice: Undefined index: task in .../wp-content/plugins/download-manager/wpdm-server-file-browser.php on line 30 Notice: Undefined index: task in .../wp-content/plugins/download-manager/wpdm-server-file-browser.php on line 4 Notice: Undefined index: page in .../wp-content/plugins/download-manager/download-manager.php on line 694 Notice: Undefined index: wpdm_action in .../wp-content/plugins/download-manager/wpdm-free-mce-button.php on line 25 Notice: Undefined index: wpdmact in .../wp-content/plugins/download-manager/download-manager.php on line 21

https://www.ads-software.com/extend/plugins/download-manager/