maverick update: messanger/mail express don't work

Hello All,

With all of the updates (Maverick), my wife's messanger & mail express no longer open up. They are locked down. I tried to dump both into the trash but Maverick won't allow me to do that. Also, I cannot find either on the dowload store. If I missed the obvious, I apologize in advance. Any suggestions?

Yes, I can wipe the HD and start over but am trying to avoid that. Any assistance would be greatful.

Thank you in advance.