After activating Hair Salon, you will see this notice:
Click Begin installing plugins. You will be navigated to Install Required Plugins page.
Simply check all of them (or all of required plugins and some recommended plugins you like) and from the drop down select Install, then hit Apply.
When finishing, go to Plugins >> Installed Plugins check all of theme and from the drop down select Activate and hit Apply
Required plugins: Essential Grid, Revolution Slider, ThemeMove Core, Visual Composer
Recommended plugins: Contact Form 7, Projects by WooThemes, WPC Added To Cart Notification, WPC Product Bundles, WPC Smart Quick View, Widget Logic, WooCommerce.