Site is down

I have joomla 3.2.3 , with purity III, sh404sef and komento extension.

I am not sure that this is due to komento extension error. How can i disable komento by using phpmyadmin. Thanks

when i try to access backend i get this error

Fatal error: Call to undefined method JHtml::getJSObject() in /public_html/libraries/cms/html/bootstrap.php on line 472

and on frontend i receive this error

Unknown column 'a.title_alias' in 'field list' SQL=SELECT a.id, a.asset_id, a.title, a.alias, a.title_alias, a.introtext, a.fulltext, CASE WHEN badcats.id is null THEN a.state ELSE 0 END AS state, a.mask, a.catid, a.created, a.created_by, a.created_by_alias, CASE WHEN a.modified = 0 THEN a.created ELSE a.modified END as modified, a.modified_by, a.checked_out, a.checked_out_time, a.publish_up, a.publish_down, a.images, a.urls, a.attribs, a.version, a.parentid, a.ordering, a.metakey, a.metadesc, a.access, a.hits, a.metadata, a.featured, a.language, a.xreference,c.title AS category_title, c.alias AS category_alias, c.access AS category_access,u.name AS author,contact.id as contactid,parent.title as parent_title, parent.id as parent_id, parent.path as parent_route, parent.alias as parent_alias,ROUND(v.rating_sum / v.rating_count, 0) AS rating, v.rating_count as rating_count FROM jom_content AS a LEFT JOIN jom_categories AS c on c.id = a.catid LEFT JOIN jom_users AS u on u.id = a.created_by LEFT JOIN ( SELECT contact.user_id, MAX(contact.id) AS id, contact.language FROM jom_contact_details AS contact WHERE contact.published = 1 GROUP BY contact.user_id, contact.language) AS contact ON contact.user_id = a.created_by LEFT JOIN jom_categories as parent ON parent.id = c.parent_id LEFT JOIN jom_content_rating AS v ON a.id = v.content_id LEFT OUTER JOIN (SELECT cat.id as id FROM jom_categories AS cat JOIN jom_categories AS parent ON cat.lft BETWEEN parent.lft AND parent.rgt WHERE parent.extension = 'com_content' AND parent.published <= 0 GROUP BY cat.id) AS badcats ON badcats.id = c.id WHERE a.id = 1 AND (a.publish_up = '0000-00-00 00:00:00' OR a.publish_up <= '2014-04-05 03:59:51') AND (a.publish_down = '0000-00-00 00:00:00' OR a.publish_down >= '2014-04-05 03:59:51') AND (a.state = 1 OR a.state =2)