Difficutlties understanding new architecture related to Docker for Windows

I reckon you refer to Preview Docker for Windows Server 1709 and Windows 10 Fall Creators Update and Exciting new things for Docker with Windows Server 1709

Docker allows only to run one of them

I use it but how can I run a second Docker machine besides the Docker for Windows (what is by Docker for Windows created VM called MobyLinuxVM).
What is the best backup strategy?