Woocommerce problem

Hello i am using Healthpress Theme and i tryed to folow instructions woocomerce integration :

Replace the loop

Next you need to find the loop (see The_Loop). The loop usually starts with a:

<?php if ( have_posts() ) :
and usually ends with:

<?php endif; ?>
This varies between themes. Once you have found it, delete it. In its place, put:

<?php woocommerce_content(); ?>
This will make it use WooCommerce’s loop instead. Save the file. You’re done.

But my problem is that in theme i can not find and replace ”<?php if ( have_posts() )
”

Anny idea?