After purchasing FooBox Pro, you will have to download the FooBox Pro .zip file.
Navigate to Plugins -> Add New and choose Upload Plugin
Click Choose File and then navigate to the FooBox .zip file you’ve previously downloaded to your computer.
Now click Install Now.
You’ll then see the below message, informing you that the plugin is being installed.
Once the upload is complete, choose Activate Plugin
Congrats! FooBox Pro is now installed and activated! You can now go to the Settings to start configuring FooBox!