You do not need an iLOK USB dongle in order to use Korneff Audio Plug-ins, only the free iLOK License Manager app, which you can get here. You can register the product to the iLOK cloud or to your computer (recommended).
An iLOK account is needed to register your serial number to the security database.
You can also use the iLOK License Manager application on your computer to redeem your serial number and to transfer your license from a Computer to an iLOK USB key or the other way around.
You can find all the iLOK help you need here.