OS X Mavericks :: Apple Mail Window Will Not Open / Show On Desktop

I open mail and it launches since it is showing in the dock and the mail menu is visible. The main mailbox window is missing and most all of the menus are greyed out, even in the window menu where it allows you to select a window to see the main mail window is not showing up. 

I have manually rebuilt the mailbox database and that did not work. I deleted the "Account.plist" file from the ~/library/mail/MailData/ folder and this seem to work. When I launched mail after I deleted this file the Main mail window was there with all my mailbox folders and emails. The only thing missing was the inbox for my main email account. Mail required that a new email account be created otherwise it would quit, I create the email account and everything was fine, until I quit out of mail. The next time I launched it again i was back to not have the main mail window. The only way to get it to come back is to delete the "Account.plist" file again and created the main email account. The only work around I have at this point is not to quit mail.