To install the plugin either install via WordPress admin using the Plugins panel (search for “Forward Attribution”) or you can download HERE and install manually.
When you have installed the plugin, click “Activate” then, in your WordPress settings menu, look for “Forward Attribution”. Click on this, and enter your license number in the box provided, then click “Activate”. Get your license for Forward Attribution here. It’s just a £0.99 one-off payment! That’s got to be a bargain.