Hi,
Currently no, because we never thought somebody would ever need quantity button next to add to cart button.
But it is a very easy modification for us to take care on your website.
After purchasing the extension, contact us through This email address is being protected from spambots. You need JavaScript enabled to view it. by providing your FTP credentials and Joomla admin account. We will take care this modification for you on your website.
Regards,
Support