The ST6 product structure now includes a Preferences folder which contains files you can edit to customize your installation. For example, SELicence.dat and material .mtl files are delivered in this location. The purpose of this enhancement is to allow non-administrator users to license and run the product as effectively as possible.
The following is a list of existing folders which also allow a non-administrator user write access:
Templates
Training
Sample Blocks
Piping Route
Frames
Images
SDK
Custom
Similar changes are also implemented for the Insight Connect and the 2D Drafting packages.