1. WooCommerce 3.3 has some major issues – just check the plugin page, so much so that it isn’t available anymore at this time. You need to downgrade woocommerce to 3.2.6 version.
Also, before update any plugin you need to be sure that theme and other plugins that you use are compatible with the new version.
2. To edit share icons you may edit etheme_share_shortcode function in file wp-content/woopress/framework/shortcodes.php.