Hi,
You would need some couple changes to disable "QUICK LOOK" feature. Basically you are going to remove some lines.
open category browse page PHP file.
ROOT/templates/<yourjoomlatemplate>/html/com_virtuemart/category/default.php
(default.php or what ever browse page layout you have chose from VM Configuration)
Then find this line:
<div class="FlexibleThumbBrowseV1QuickBuy"> <a class="FlexibleBrowseV2QuickBuyA" rel="facebox" rev="iframe|550|900" href="<?php echo 'index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=' . $product->virtuemart_product_id . '&virtuemart_category_id=' . $product->virtuemart_category_id . '&tmpl=component&flexible=quickbuy'; ?>" title="<?php echo $product->product_name ?>"></a></span></div>
Delete it completely.
BE AWARE: There are 2 different places you will find this DIV tag. One of them for LIST layout, the other one is for GRID layout. (around 238th & 505th line) Make sure to remove both of them.
Cheers.
FlexibleWD Support Team.