Installing Simple Woocommerce wishlist can be done either by searching for "Simple Woocommerce wishlist" via the "Plugins > Add New" screen in your WordPress dashboard, or by using the following steps:
Download the plugin via WordPress.org.
Upload the ZIP file through the "Plugins > Add New > Upload" screen in your WordPress dashboard.
Activate the plugin through the 'Plugins' menu in WordPress
Visit the settings screen and configure, as desired.