[MlMt] how to reopen main MailMate window

[Shoshanna Green]

I open all email messages in separate windows rather than using a 
three-pane view, so that I can see multiple messages at once and jump 
between them with the keyboard using Witch. But occasionally I 
accidentally hit command-W when the main window is active, closing it. I 
can't find any way to reopen it; I have to quit and restart MailMate. Am 
I missing something, or is this truly the only recourse?

Shoshanna Green
shoshannag at gmail.com