How to Install Simple Social Buttons PRO?

1. Go to WPBrigade.com▸ Plugins ▸ Simple Social Buttons.
2. Choose a package that you want to buy. 
3. If you’re buying the PRO version, select the product to add to the cart. Go through the Checkout and Payment process to complete your purchase.
4. Once you have successfully completed the purchase, an email will be sent with order and license details.

 After making your purchase you will be provided with Social-share-buttons-pro.zip and Licence keys .

There are two ways to install SSB Pro.

To make the SSB Pro working first you need to install the Free Version. 

I assume that you have already installed and activated the free version, and have successfully purchased SSB Pro Version.