: You are looking for a guide on how to set up the plugin or find a "setup key."

: You are looking for a "long paper" or technical documentation explaining how the TurboSmooth Pro algorithm works.

: Typically, the setup involves placing the .dlm plugin file into your 3ds Max Plugins folder.

However, the phrasing of your request is a bit ambiguous. It could mean one of two things:

Assuming you are looking for or a setup guide : About TurboSmooth Pro