[Plugin: Taxonomy Images II] plugin admin template could not be found

I found another version that works fine here: https://downloads.www.ads-software.com/plugin/category-images-ii.zip

After viewing the code, I have changed something as follow
On template-tags.php, line 62
From
$term_ids = explode( ',', $r['term_ids'] );

To
$term_ids = explode( ',', $r['category_ids'] );

Line 72
From
if ( ! $r[ 'echo' ] )
To
if ($r[ 'echo' ] == 'false' )

On class-Category-Images-II.php, line 220, add this code:

if($args['echo']=='false'){
return $terms;
}

You can use function like this

$img = ciii_category_images('category_ids=11&term_ids=true&echo=false&size=original');
var_dump($img[0]['image'])