External View in TMO 2.5

I just installed TMO last night, and I have found that I can't use the external view in campaign mode. I have gone into the Options menu and unselected the "no external view" choice, applied changes, then restarted the campaign, but everything resets and I have no external view. I have tried using the F12 button, as was suggested in another thread. Nothing. The free camera button also does nothing. I saw in another thread something about an options screen in career mode, but the one I have doesn't include the external view choice.

Is this something I can fix in the cfg file, or am I missing something easier?