Hi, for anyone interested, I appear to have fixed the issue. In checking on the properties tab on a file I found it was set to open with the Steinberg Download Assistant. I changed it to the Steinberg Libraries Assistant and Voila !, it then proceeded to register all the Halion Content and populated the entire content to the Library.
Why it was set to open with the Download Assistant I have no idea. I only figured it out by looking at the properties tab on my laptop where I downloaded some Halion content and compared it with the material on my PC. Another Cubase mystery solved; sometimes though I feel like Cubase is Moriarty and on a bad day I am Dr Watson sans Sherlock Holmes. Till the next time…