Thanks Jimmy and Justin,
I will revisit this and see what went wrong. Perhaps the checkbox you mention should be (sorry -edit) unchecked by default? Is it checked by default?
I didn't - in any test - check such a box!
Also could someone address Garry's last post please?
Oops - can't I re-enter the Sculptor UI, and there is no 'edit' function on any Sculptor preset as there is for any other extensions. How to get back in, please?