Designed to work perfectly within the revised Blender 2.8 viewport and UI paradigm.
For , you do not need to download Archipack from an external site, as a free "Community" version is already built into the software. How to Access and Use Archipack in Blender 2.8 Blender 2.8 - Create stairs with archipack archipack blender 2.8 free download
Here is what you get with the free download: Designed to work perfectly within the revised Blender 2
If you are looking to take your ArchViz projects further, let me know: including straight and curved options
Generate various stair types, including straight and curved options, with adjustable step counts and handrails.
Click the three lines icon in the bottom left and select to ensure it stays active every time you open Blender.