What are new folders in the Portrait Dialogue 6.2 Distribution media

As of Portrait Dialogue version 6.2( there is a new folder in the release media.

There is now a MapFiles directory containing *.dbg and *.map files specific to this release (and each release from now on) which are needed for debugging.  
These files will be used when the engineers make specific requests.  

Questions have been asked about the SDK directory, which was new with Dialogue 6.1.1.
This contains a toolkit for partner or customer developers who are working on something requiring access to the Dialogue libraries.

UPDATED:  March 8, 2018