The document titled "Step by step instruction" was removed at the version 1.10.1 released at 12 May 2019 because the version 1.10 introduced a completely new approach of creating a visual testing project from scracth. As of the version 1.10, you are supposed to use a Gradle plugin visualtestinginks to import the necessary resources which enables your own Katalon Studio project for Visual Testing.
Please read the documentations of visualtestinginks: