Starting Point for working with DraftSight (API Documentation)

I am Ismael from ABGAM Segula Technologies in Spain.

We are newly distributors of DraftSight, we have asked for DraftSight premium licenses, meanwhile I need to know some questions:

- Where can I download the commercial version of Draftsight? Is the same than free version? How can I activate as commercial version?

- Once my DraftSight is activated, how can i access to DraftSight API? where is the documentation about DraftSight? I am very interested in documentation about API.