upgrade from Windows Live Mail (2009) to the latest version of Windows Live Mail

I installed wlsetup-web.exe at home on a Windows 7 (32 bit machine.  I installed all the programs.  I checked out Windows Live Mail (with the ribbon), and I liked it.  So, I ran the same file (wlsetup-web.exe) on a Windows 7 (64 bit) machine, but I unchecked all the program options except the one for Windows Live Mail.  I managed to import my email store before I was surprised not to see the ribbon, and to discover that there was no button to send and receive mail.  I started checking around, and discovered I had Windows Live Mail version 2009 (Build 14.0.8117.0416).  I have been trying to "upgrade" to the latest version, but I can't seem figure it out what version that is, where I get it, and if I can upgrade without remigrating the email.