Windows Mail won't launch after file transfer from Vista

[bizzybody]

I did a file and settings transfer from Vista Home Premium to Windows 7 Home Premium. When I went to launch Windows Mail on the 7 system, Avast 7 complained about changes needing to be made in the e-mail so its security could handle it.

So I permanently shut off Avast"s e-mail protection. Now it pops up in the tray that there's new e-mail but clicking on that or the Mail icon pinned to the taskbar does nothing.