It is because we have removed the PHP lines. I am writing down your request and hopefully it will be available in the next version.
If you don't want to wait, you can apply the patch, if you are little familiar with coding.
The official PHP lines to generate the "Back to Category" link is this:
<?php // Back To Category Button
if ($this->product->virtuemart_category_id) {
$catURL = JRoute::_('index.php?option=com_virtuemart&view=category&virtuemart_category_id='.$this->product->virtuemart_category_id, FALSE);
$categoryName = $this->product->category_name ;
} else {
$catURL = JRoute::_('index.php?option=com_virtuemart');
$categoryName = jText::_('COM_VIRTUEMART_SHOP_HOME') ;
}
?>
<div class="back-to-category">
<a href="<?php echo $catURL ?>" class="product-details" title="<?php echo $categoryName ?>"><?php echo JText::sprintf('COM_VIRTUEMART_CATEGORY_BACK_TO',$categoryName) ?></a>
</div>
And you should include those PHP lines into this PHP file (which is to control the product details page):
templates/YOUR_TEMPLATE/html/com_virtuemart/producdetails/default.php
(default.php or flexv2.php which ever layout you are using currently for the product details page)
Regards,
Support