PLUGOarts

Follow the steps mentioned above.
I found it easiest to use FTP to simply rename the Plugins folder then Download it. After that add a new EMPTY plugins folder, then add each plugin to the new plugins folder one at a time. You’ll either find the offending plugin or find that you don’t need as many as you had.

I’m also faced with the

Fatal error: Class ‘ec_categorywidget’ not found in /home/trickyp/plugoarts.com/blog/wp-includes/widgets.php on line 591

But am not quite sure how to reset to a default theme. I looked at phpMyAdmin via my hosts at DREAMHOST. Unfortunately their interface and the instructions in How to deactivate all plugins when not able to access the administrative menus? did not line up with my current level of understanding. i.e. couldn’t figure it out.

I looked at line 591 in that widgets.php file and it read as follows –

Line 582 /**
Line 583 * Register a widget subclass.
Line 584 *
Line 585 * @since 2.8.0
Line 586 * @access public
Line 587 *
Line 588 * @param string $widget_class The name of a {@see WP_Widget} subclass.
Line 589 */
Line 590 public function register( $widget_class ) {
Line 591 $this->widgets[$widget_class] = new $widget_class();
Line 592 }

if only I could just add the proper ‘ec_categorywidget’ class.