First of all, delete or deactivate the free version of Woocommerce Products Slider. Then install the Pro version and activate the plugin. After successfully installing and activating the plugin, you will find Woo Carousel menu on left column of WordPress dashboard.
To create a new carousel slider, go to Woo Carousel >> Add New
Configure any options as desired and then copy the shortcode from Shortcode section which is at the bottom of the Settings panel.
Now paste the copied shortcode wherever you want to display the carousel slider.