How to Update Plugin Included?
In order to update the plugins included in the theme you need to:
Way I, Update plugins via update new theme:
1, Install the latest version of the theme.
2, In WordPress Admin Panel => go to Plugins => Deactivate and Delete all the premium plugins, e.g : WPBakery Visual Composer, Slider Revolution, LayerSlider WP, etc...
3, In WordPress Admin Panel => go to Appearance > Install Plugins and re-install all the premium plugins.
Way II, Update plugins, but don't want update new theme:
If you don't want to update the theme but want to update the plugins.
1, Re-download the newest version of the theme from themeforest, click download button and chooise "All files & Documentation".
2, Unzip theme package .zip file to a folder and find in theme package has a folder plugins.
3, In WordPress Admin Panel => go to Plugins => Deactivate and Delete all the premium plugins, e.g : WPBakery Visual Composer, Slider Revolution, LayerSlider WP, etc...
4, In WordPress Admin Panel => go to Plugins => Add New => Upload Plugin => Install and Active plugins.
=> If you still need help with updating the plugins please create a ticket under category of your theme use.