That eventually worked.
My problem was that for some reason, a copy of Cinema C4D was still listed in processes and hence the default settings were not appearing until I ended the hung process.

Thanks for the reply.

How or where do I find the default kernel and camera settings?

Right clicking an entry has no reset to default.
No where is it listed in the manuals.

Loading a new blank file still loads the last used settings.

If I changed something I should not have, how do I get back to a fresh start?

If I ...