Which version of The Oregon Trail is this?

This is the 1992 MS-DOS version.

Here's another screenshot of the game:

You can find more info here.

You were playing The Oregon Trail Deluxe (the 1992 MS-DOS) version.

This is actually Ver. 1.2

http://www.twitch.tv/monotonetim plays it all the time. The older version the other comments refer to has a slightly different menu.