In the past year or so, they have dropped the seperate Soft Particle environment for the integrated one by Phoenix Tools. I don't have my CD's handy but I am pretty sure you have to load this seperately. Not sure if it was from a PT's CD or on one of the Soft3D CD's.
I think this happened in 3.9. Not sure what to do if you want the old particle system. I'd call your reseller.
Hope this helps,
Urp