I contacted my host and this is their reply:
"The Plus hosting account you have for golden-bay.co.nz does provide a free shared SSL certificate. To use that you will need to configure the shop to use
as the secure address.
Files do not need to be uploaded to any specific secure directory. If they work using the non secure address they will work using the shared SSL certificate address above."
Jason .... Can you please tell me where I can configure the shop to use the URL above?