After activating Retrolie, 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, it should look like this:
Next, go to Plugins >> Installed Plugins check all of theme and from the drop down select Activate and hit Apply
Required plugins: Insight Core, Retrolie Extension, WPBakery Page Builder, Revolution Slider.
Recommended plugins: WPBakery Page Builder (Visual Composer) Clipboard, Contact Form 7, MailChimp for WordPress, WooCommerce, WooCommerce Smart Compare, WooCommerce Smart Wishlist