I am using a July 22nd build of Blender 2.8 beta. I am using Archipack Pro. I found this video: https://www.youtube.com/watch?v=MKH5scLVlC0 but it looks like it's an older version because mine looks very different.
I have selected the walls, but I cannot find the create curves-> Mouldings panel.
I might be overlooking something obvious, but the documentation is not the greatest and some of it is out of date now or just nonspecific enough it's difficult to figure out what needs to be done first. https://blender-archipack.gitlab.io/user/archipack%20objects.html?highlight=molding This is where the documentation mentions it, also with something called "slab"