Hi Noel,
Well I'll have to work right through that thread link.
But I have found a series of installers in the PG Music folder that was referred to. Loaded all of those and that has given me fx listing. eg PG chorus etc about ten or so of them.
At the bottom is 'add vst plug ins' and again when I follow that route I get the error as previously detailed. However the thread mentions authorisation via IK multimedia so I will look in more detail at that and get back to you. (grandchildren duty calls)
Thanks,
Pete