On 14.04 "Unlock from launcher" option is not working. I have removed zeitgeist and I do not have any folder in .local/share/zeitgeist.
[EDIT] It seems removing zeitgeist is the cause of the problem. I see this in the logs when I click on the Unlock button:
ERROR 2014-07-11 15:05:27 unity <unknown>:0 file log.c: line 980: unexpected error: Error calling StartServiceByName for org.gnome.zeitgeist.Engine: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ExecFailed: Failed to execute program /usr/bin/zeitgeist-daemon: Success (g-dbus-error-quark, 23) ERROR 2014-07-11 15:05:27 unity <unknown>:0 AtkObject* unity_a11y_get_accessible(nux::Object*): assertion 'object != NULL' failed