When I updated for version 4.02 all teh questions were gone

Please,

I had questions from users on my website (www.portadeembarque.com.br), and when I updated the plugin to version 4.02 all the questions has gone away. After, i tryed to update again to version 4.05, expecting the problem were resolved but there is still the same problem. I have no questions and answers on my website now. Please, how do I do to have all the questions and answers back??

natalia