Creating a view with a file selects the wrong type

I am using 7.x-3.x-dev of download count. I have created a content type with an "attachment" field: it is a field of type File and with widget File. Now I would like to show a page where the author of the content views who has downloaded the content attachments, so I tried to create a view.
My view shows content of type "File". Since I need to show who downloaded the file, I use a relationship with "Download history: User". The query that Views constructs for me is the following:
SELECT file_managed.filename AS file_managed_filename, file_managed.uri AS file_managed_uri, users_download_count.uid AS users_download_count_uid, download_count.id AS download_count_id, users_download_count.name AS users_download_count_name
FROM {file_managed} file_managed
LEFT JOIN {download_count} download_count ON file_managed.fid = download_count.id AND download_count.type = 'file'
LEFT JOIN {users} users_download_count ON download_count.uid = users_download_count.uid
LIMIT 10 OFFSET 0

this shows nothing because of the clause download_count.type = 'file'
In my database all the entries in download_count table are of type 'node' and the description on the database field says that this is ok (The name of the entity type to which the file was attached when downloaded).

If I remove (or if I put it to 'node') that clause from the code, everything works fine.
The interesting code is in download_count.views.inc:

foreach (entity_get_info() as $entity_type => $info) {
    $data['download_count']['table']['join'][$info['base table']] = array(
      'left_field' => $info['entity keys']['id'],
      'field' => 'id',
      'type' => 'LEFT',
      'extra' => array(
        array(
          'table' => 'download_count',
          'field' => 'type',
          'value' => $entity_type, 
          'operator' => '=',
        ),
      ),
    );
  }

It seems to me that $entity_type has the wrong value, but I do not know if it is an error of my configuration or not. I can solve my issue by putting the string 'node' instead of $entity_type, but well I prefer not to do so because is too quick and dirty for my taste.

Thank you for your support!