How to re-enable introductory onboarding wizard after reinstalling WooCommerce
In the WooCommerce -> System Status admin page, under the Tools tab, there's the Create default WooCommerce pages tool that
will install all the missing WooCommerce pages. Pages already defined and set up will not be replaced.
WooCommerce now has a Help tab just to the right of the Screen Options tab in the Wordpress (v4.8) admin panel. Click on the tab and you will discover the Setup Wizard as a selectable item ... among many other helpful goodies ... including a setup video WooCommerce Setup Wizard
You can restart setup wizard going to www.yoursite.com/wp-admin/?page=wc-setup. It worked for me!