Doesn't seem to have made any difference so far but may be I'm doing something wrong. I am not working on the live site.
Can you please take a look below and tell me if I am on the right track or am I missing something so obvious to professionals.
In "\templates\eximium\html\" I had no "com_users" directory so I created this and added the two files listed below from the "plugins\system\yjsg\legacy\html\com_users\" directory.
The two files are registration.xml and default.php
I added line 17 "$this->form->loadFile( dirname(__FILE__) . DIRECTORY_SEPARATOR . "registration.xml");" under
"$this->form->reset( true ); // to reset the form xml loaded by the view"
I then cleared the site cache...