Here is the link on what it is and what it does. This program created by TokenMaster will create a Token solution the first time it is run, and then you configure E-Sys to use that token, and then you simply run the launcher every time you want to use E-Sys. UPDATE: TOKENS ARE NOW FREE!!!! (thank you for bringing it to my attention and for confirming) There is no reason to buy Token Solution anymore. The basic service is free, and even has an smartphone/tablet app that lets you control the destination.
From there, anyone can help you pretty much including in case you get confused on where to install the data files etc.
Just download the full version for windows or mac, then select home/personal use (this is the free version), and proceed to install.
I work with my Surface Pro 3 so I needed this adapter.
The E-Sys software zip file comes with installation procedure. You can also PM for the latest software of both or on bimmerpost or bimmerfest (both are great guys and have very knowledgeable information regarding coding). He usually sends a link to ESYS and psdzdata files download links upon purchase via email- I don't know where he gets his links, but I know the downloads are supposed to be free and shared with the community.