There is not much different between sideview and top-down tilesets, I think. In the TilePipe different types are divided by symmetry.
For example the blue 255-tile from the diagonal example is fully symmetrical, so it is more of a top-down style one. You still can use tile without symmetry in top-down game, for example, if you want to show shadows. The most straightforward preset to use is Generation type: Overlay, Preset: 4 parts, symmetry - full. You can go from the example.
If you want, I can make a tutorial, sure. But I was working on a total rework of the UI, so was reluctant to do so.
Randomization is also a useful feature in TilePipe - just put some variations of your input picture in rows and the tiles will be generated randomly.