I have installed Ubuntu 13.10 on VirtualBox 4.3.6, running on Windows 7. I have installed the VirtualBox Guest Additions on Ubuntu.
I have used this .deb file to install
Here is a simple solution that worked for me
Close the Sublime Text 3, if it is open. Open and edit the file ~/.config/sublime-text-3/Local/Session.sublime_session
to make sure that, "menu_visible" is "true" in all places in that file.
"menu_visible": true,
Source: http://www.thefourtheye.in/2014/01/un-hiding-menu-bar-in-sublime-text-3.html