<?php
global $wpdb;

$sql = "ALTER TABLE  `{$wpdb->prefix}icl_strings` CHANGE  `language`  `language` VARCHAR( 7 ) NOT NULL";
$wpdb->query( $sql );

$sql = "ALTER TABLE  `{$wpdb->prefix}icl_locale_map` CHANGE  `code`  `code` VARCHAR( 7 ) NOT NULL";
$wpdb->query( $sql );

$iclsettings = get_option( 'icl_sitepress_settings' );

$iclsettings['posts_slug_translation']['on'] = 0;
update_option( 'icl_sitepress_settings', $iclsettings );
