This problem has been reported before and marked "resolved" - but it's not.
I want to enable Editors to view the stats. If I type Editors into the Permissions box, I get this message:
Fatal error: Call to a member function remove_cap() on a non-object in /home/......./public_html/creativeexiles.com/wp-content/plugins/wp-power-stats/admin/config/index.php on line 92