Format is tab separated stretch preferences.
Name                          	Value
Activate Stretch	True
Loop Stretch Over Extrusion Width (ratio):	0.15
Path Stretch Over Extrusion Width (ratio):	0.0
Open File to be Stretched	
Stretch From Distance Over Extrusion Width (ratio):	2.0
Perimeter Maximum Stretch Over Extrusion Width (ratio):	0.38
windowPositionStretch Preferences	522+431