What seems to have worked (although I've yet to fully test as got to run....) - Is that I've simply copied the function it moaned about straight into the page that was trying to access it.

That caused it too moan about another missing function - so I did the same, and repeat a few more times.

Now I get my admin menus back including this excellent new 'Admin Settings' one which I'll try later.

Question though - Do you forsee any problems arising from this fix I've done???? Obviously still grateful if there's a answer to the main issue (my prior post) as I'd prefer to understand from those that really know what they're doing!!!!

Thanks!