[Plugin: Content Types] Image file upload is broken

The image file uploader is not working. When the popup opens I get the following error message:

Warning: require_once(***\wp-content\plugins\content-types-wordpress-plugin\field_types\select_image\popup.php/wp-admin/admin.php) [function.require-once]: failed to open stream: No such file or directory in ***\wp-content\plugins\content-types-wordpress-plugin\field_types\select_image\popup.php on line 3

Please fix this, because this plugin is just what I need but for me it is useless without the image uploader.

http://wordpress.org/extend/plugins/content-types-wordpress-plugin/