hi,
this is maybe the wrong forum (rendering and presentation will be better)
but I will try to help:
1. the "catalog window" should be open. normally it is located under the preview. if not, make it visible
2. the catalog window consists of two parts: left side to brows the folders, right side with preview of shaders/pictures/objects
3. switch to shader mode if not visible.
4. drag a new shader folder from windows explorer directly into browser part of catalog window.
this is only possible with drag and drop, no menu command!
you have to do it separately for objects, pictures and shaders, even if it is the same folder.
the settings are saved when you save your file and close artlantis. ( if you shut it down with task manager, in this case next time the shader will not be visible).
have a look at the tutorial section on the artlantis website. you can learn a lot there.
best regards, gerd