Outlook email file exported as unix executable file, not olm. Now I can’t import the file into Outlook.

I have outlook 2011 in my MacBook Pro (OS X Lion) and use an exchange account with email size limitations, I recently archived my email but the exported file was saved a unix exec file not olm.  I lost all of my emails in outlook and cannot import the unix exec file.  I have tried to change the file extension and the app chosen to open the type of file wo success.  My Mac still does not recognize what type of file it is.  Any Help or recommendations?  I am desperate.  Too many valuable emails lost.  Thanks.