Checkout Process Not Working

Hi There

I have moved my Joomla installation from http to https by moving the folder via ftp and updating the configuration.php file. The site work perfectly but my Hikashop Business checkout process isnt working. I can add a product to the cart then click proceed to checkout where it direct me to the cart with the proceed to checkout button. when i click that it just loops back to the same place. so it doesnt continue past that point. Is the any files in Hikashop i need to edit after changing it over to https?

thanks

I don't know what happened but its working again.