3. How to import a Addon bundle in Addon Library?
Click on the menu item "Addon Library"
Then click on the "Import Addons" button
Click on the browse button and select the zip file of the Addon Bundle you want to install - for example "headers_vc_addons.zip"
Click on the blue "Import Addons" button.
After installation is successful you will see a category for the bundle you installed on the left panel inside the Addon Library.
Your done with step 3 - Go to step 4