Windows 7 – Error: connect ENOENT //./pipe/docker_engine

I have installed DockerToolbox-1.12.2.exe in Windows 7 from https://github.com/docker/toolbox/releases/tag/v1.12.2 link. After installation, if I try to launch Kitamatic, I am getting
[![enter image description here][1]]
Error: connect ENOENT //./pipe/docker_engine.

I have tried RETRY SETUP and USE VIRTUALBOX options available, but didn’t helped much. Can anyone suggest, how to proceed?

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