Anyone?
I have changed my theme from the custom one I developed to twentyfourteen in phpmyadmin. this has not made a difference. Basically, if the general troubleshooting tips have not worked, what else is likely the problem?
edit: And I should add that one version of the theme I developed had become "stuck" in the themes section of the dashboard prior to this, by which I mean I tried to delete it normally but couldn't.