Virtuemart is not changing even after editing product.php and virtuemart.ini

[mscott0418]

Im building a new site and made these edits to virtuemarts:
$q .= ' GROUP BY `virtuemart_product_id` ORDER BY virtuemart_product_id, p.product_sku'; in /administrator/components/com_virtuemart/models/product.php
and
COM_VIRTUEMART_ADDTOCART_CHOOSE_VARIANT="Choose a product " in  /language/en-GB/en-GB.com_virtuemart.ini
These changes are not showing up on my website and I dont understand why. If anyone could give me a way to fix my issue I would greatly appreciate it.