Hello José,
I am running MaxDesign 2013, Vray 2.40.03 an ForestPro 4.0.2.
If I open one of the presets files e.g. the "_fp_vray_fallen_leaves_maple.max" everything looks fine, the problem appears only using the presets from Library browser...
I sent you the file separatly via email..
Thank you
Florian