Please first install the Library Loader application from: http://componentsearchengine.com/pcb-libraries.php

If Library Loader is already installed please make sure it's running by launching it from the desktop shortcut.

For help loading the SamacSys libraries into DesignSpark PCB please Click Here: https://www.samacsys.com/dspcb/

Alternatively, if you wish to manually import the DesignSpark PCB libraries please refer to https://www.samacsys.com/designspark-pcb-dsl-import/