Clicking on the configure store button takes me to the frontpage of my website. I am using the latest version of joomla 3.1.5
It gives the following url:
http://joomlasite/index.php?option=com_quick2cart&view=vendor&layout=createstore&store_id=1
It gives the following url:
http://joomlasite/index.php?option=com_quick2cart&view=vendor&layout=createstore&store_id=1