Format is tab separated chop preferences.
Name                          	Value
Add Extra Top Layer if Necessary	True
Open File to be Chopped	
Import Coarseness (ratio):	1.0
Correct Mesh	True
Unproven Mesh	False
Layer Thickness (mm):	0.4
Layer Thickness over Precision (ratio):	10.0
Layers From (index):	0
Layers To (index):	999999999
Perimeter Width (mm):	2.0
windowPositionChop Preferences	600+0