Make sure you’ve got a copy of the Smartlink Product Designer downloaded. If not please contact your account representative and get a copy before you proceed.
Login to your website and from the WordPress Dashboard navigate to the Plugins tab. Click the Add New button at the top of the page and this should then take you to another screen where at the top you should see a button that says Upload Plugin.
Click this to proceed. From here select Choose File and select the plugin. You should now be able to click Install Now.
With the plugin now installed, please make sure you Activate the plugin.