We have updated our free plugins with support for Max 2017.
Forest Pack and RailClone for Max 2017 will be ready soon, short time after that V-Ray for Max 2017 is released.
We have identified a crashing bug that affects Forest Pack 5.0.5 and RailClone 2.6.0 with Max 2011 and 2012 64 bit.
The bug occurs using the Style Editor in RailClone, Forest Effects in Forest, or the lister with any of the plugins.