Sidebar disappeared after installing woocommerce plugin

Hello everyone. I am looking forward for help because i stuck on this problem for 3 days. I am new to wordpress and i was using the page builder plugin for making product list, the same as it was in website design but then i had pagination problem. Not just problem it wasn’t working at all because as it appears i need to make a standard post and make for them categories which i can’t add to page because i need to make a static page for my menu. It is a mess you are right. So I’ve downloaded woocommerce to make my menu but now the problem is that my sidebar gone and i want it back:). Even new pages don’t show sidebar at all. I think my theme had some code in case of woocommerce plugin installation to make full width layout, but i don’t see any code like that. My theme has a woocommerce file and here is a code

<?php
/*
 * WooCommerce
 *
 * @package The WP Theme
 */

get_header(); ?>

	<div id="primary" class="content-area full-size">
		<main id="main" class="site-main" role="main">

			<?php woocommerce_content(); ?>

		</main><!-- #main -->
	</div><!-- #primary -->

<?php //get_sidebar(); ?>
<?php get_footer(); ?>

Any help would be appreciated.