Yesterday evening I updated Microsoft Office 2011 to 14.5.0.  My iMAC is operating on Yosemite on 10.3.3. 

Today, when I went to check e-mails on Outlook, the splash screen appeared briefly and disappeared.  The main Outlook window would not open.  I have tried rebooting (several times) while holding the option key to rebuild the identity file with no success.  I have deleted the Outlook pref file from the Library.  Still no success with the program. I can open the "e-mail message" under "file new" and compose and send an e-mail.  However, the main program window still will not open.

All other Office programs (Word, Powerpoint, Excel) open with no problems.  The problem seems to be associated with the update to Office 14.5.0 since that is all that has changed on my computer since I last successfully used Outlook.

Hope you can help!

Thanks.