Badex

I used tax_query instead of tag__not_in in my functions.php file and it works now.

add_action( 'pre_get_posts', 'remove_event_tag');

function remove_event_tag( $query ){

  if ( is_admin() || ! $query->is_main_query() )
      return;

  if ( is_home() ) {

      return;
  }

  if ( is_post_type_archive( 'event' ) ) {

      $taxquery = array(
        array(
            'taxonomy' => 'event-tag',
            'field' => 'id',
            'terms' => array( 53 ), //the ID of the event tag
            'operator'=> 'NOT IN'
        )
    );

    $query->set('tax_query', $taxquery);
    return;
  }
}

This is what Themepunch are saying in case anyone else has this problem.
Hi,

Thanks a lot for your question.

First of all i want to tell again, everything is safe and Clean. You dont need to update the Plugin neither to worry about any mailware or similiar viruses or trojans.

None of our plugins or themes was influenced to any time, and all Items and Downloadable files are , were and will be clean !

Some Background information:

We transfered some of our webservers and Domains to a new and better Provider today night, and during this transfer we have been attacked. Some of our Demo content has been influenced.

We fixed the issue in a very short time, however Google Blocked us without any real reason. Google just unlocked the sites, and also decleared all our Content as Clean and safety.

Thanks a lot again and have a great day, and please do not hesitate to contact us any time if you have further questions.

Cheers,

Your ThemePunch

I have the same warning on http://www.mindfulnessdublin.com. Does anyone have more information?