Live Mail 2012 fails to start

This morning we were using live mail and it was working fine.  We returned shortly to find the live mail icon wasn't in the try any longer (apparently stopped on it's own).  We've tried numerous times to bring live mail back up but each time we see the icon for live mail 2012 indicting it's starting but then almost immediately another window pops up in from of that one indicates "Windows Live Mail has stopped working"  and the only option is to close the window and live mail.   Any assistance you can provide would be greatly appreciated. Our PC. is running windows 8.1