Hi
I have found a critical coding mistake in the category PHP page.
Open this PHP file:
/templates/flexible_coolmart/html/com_virtuemart/category/default.php
and look at the 409th line and find this:
if ($params->get('category_addtocart_list',1) and !empty($product->customfieldsCart)) {
and replace it with this:
if ($params->get('category_addtocart_list',1)) {
Then the "add to cart" button will start being appeared (on category page, in ListView layout)
Sorry for the trouble. I really don't know why our developer team has included that unnecessary check there though.
Regards,
Support