Hi,
I can see the image of your products in the product page. So it seems that you already found the solution, or I didn't understand your problem ?
There is actually no option to not show the description. It is displayed by default on the product page.
All I can think of is that it comes from a change of the view file, likely coming from the ArtZoomin plugin.
In any case, it should be easy to add back the description on that page. You just have to edit the file "show_default" via the menu Display->Views and add such line at the end:
<?php echo $this->element->product_description; ?>