Thank you, I am now able to access phpMyAdmin. This is a great step forward.
I am not actually trying to change my password. What I am trying to do is to change the URL which I have worked out how to do by following the instructions in the WP codex under "Changing The Site URL" http://codex.wordpress.org/Changing_The_Site_URL
This however seems to have introduced a new/different issue. Having changed the URL I am no longer able to log in to my WP panel.
I have returned the URL to its original name and all is back to square one, thart is I can log in to my WP panel, etc., etc., but my goal is to change the URL and then be able to sucessfully log in to my WP panel and continue on.
An observation/speculation. While in phpMyAdmin, after making a change to an option I see at the top of the screen, a field inside a green outline that says 1 row(s) affected that has the option of taking an action called [ Create PHP Code]. Is this something I am supposed to do? That is, might this be an action that would propogate the URL change throughout wherever it needs to be changed so that when I try to logiin to my WP panel I will be able to do so? I'm clutching at straws in the wind here now.
As before, any assistance gratefully appreciated. thank you,