Spectrasonics has updated the Stylus RMX plug-in to v1.8, which introduces a new and more flexible system for parameter automation. This new system is similar to the automation system in Omnisphere, so if you've used Omnisphere, you'll find this system familiar.
To enable a parameter for automation, pop up the RMX Utility Menu (in the lower right corner of the plug-in window) and choose MIDI Learn->Enable Host Automation. Then touch any knob, slider, or on/off button which you want to enable for automation. Once enabled, the parameter for that control may then be automated.
In addition, this version contains a fix for a display problem on Windows when using multiple monitors while using the 3GB switch in your boot.ini file.