Hello,
Thank you very much for choosing our theme and for contacting us.
WPBakery Page Builder and Revolution slider come bundled with our theme but they can’t be activated with our purchase code. Actually, you don’t need to do this. Only in case you want to get free premium support from its author, you can purchase it from Codecanyon.
You can edit the current slider, set another one, create yours and you do not need to purchase any license for this purpose. Please check the slider documentation: https://revolution.themepunch.com/joomla/documentation/
Best Regards