There are also instructions for installing the hatch patterns for AutoCAD R14 to 2014 below this first set of instructions. The first set of instructions are for installing the AutoCAD hatch patterns in AutoCAD 2018, 2019, 2020, and 2021.These instructions are the same for AutoCAD LT 2018, 2019, 2020, and 2021. Here are the instructions for installing the ArchBlocks Hatch Patterns for AutoCAD.