First post here...
I'm using mam_tor.afphoto.
In the af workbook, p144, 'Blend mode creativity', it says:
1 select the curves adjustment layer
2 add new adjustment layer > black & white adjustment
and then perform processes: red picker to -200%, yellow to 0%, blue & cyan to 50%.
I see that there is already a 'black & white adjustment' layer above the curves layer, ticked for 'visibility'.
It is already set to 'overlay', the opacity already on 60%, the red picker is -200%, the yellow is on 0%, and blue & cyan are at 50%, i.e. the settings you're supposed to make in your new layer...
I'm assuming the inclusion of this layer is an oversight in the sample image file.
P.S. Also the 'clarity' live filter, as per 'creating a moody sky' page 146: already there, also 'selective colour adjustment' (p148), and the 'unsharp mask' (p150). In fact, looks to me like all the changes are already included...
And it won't export.
mam_tor2.afphoto