I recall that scenario vividly, the heavy overcast rainy day, 3 SD40's of BNSF, had to pull forward, back up next track and couple a string, forward and do it again with the last string that had a SD40 pusher.
It was a slow run because we're pulling about 80-90 coal cars fully loaded (very heavy), where the dynamics were required with careful apps of air brakes downhill 2.8 to 3.4% grades.
I was never able to complete the scenario, as about 10 miles from the destination yard (San Bernardino), a switch was set the wrong way and derailment ensued.....
My guess is this: The author that released it later discovered the error, pulled it off the webmaster freeware site, and for some reason never uploaded it later.
IMHO, it was a good scenario, except for the minor switching error, it was a difficult scenario, I think that scenario was way ahead of its time, compared to other freeware scenarios, and I mean that in good way, it made one a better engineer running later scenarios.
Hopefully our author will re-release it?