Warning: implode(): Invalid arguments passed

When having a file for download (not for free, they have to pay) I Get the error message:

Warning: implode(): Invalid arguments passed in /srv/klnt/web/Sitename/htdocs/administrator/components/com_hikashop/classes/file.php on line 275

And I can not download the file.
When I make the file down-loadable for free I CAN download the file.
I'm using the latest version of hikashop (HikaShop Starter 2.0.0) in Joomla! 2.5.7

Can this be a bug?

Kind regards,
Evert

Yes it's a bug which has already been fixed on our end.
Please redownload HikaShop on our website and update it on yours and it will work.

Super fast reaction! and it is indeed fixed.
I'm very pleased!