Live Mail 2012 lost emails under alias main folder after update from MS website

Received the email from MS that said Live Mail may stop working soon.  Found a link that said I should update from MS update site.  Did that.  Seemed to go OK, but now I notice that certain folders have gone missing.  These are all the folders that were child folders of my alias account, (*** Email address is removed for privacy ***).  How can I get these back?  They were important to my business!!  Everything else seems fine.  My Live Mail is 2012.  Not sure what it was before the update.  May have been the same.  Help please.  This is really not acceptable.  There is nothing shown under Deleted or Recovered folders.