Windows 7, WLM 2012.  WLM stopped receiving my primary email messages so I uninstalled and reinstalled.  Backed up first on desktop and thumb drive but most of my stored folders and all sub folders are missing.  What went wrong? Can they be retrieved?

Now WLM will not work at all, none of the accounts will receive mail so I give up.  Trying to switch to OUTLOOK now but I desperately need to recover my folders.  Please Help!