RapetierHost settings help needed for support matrial

I've tried the defaults when enabling support material (one extruder) in Rapetier Host. However, when the print finishes, the support is not breakable and melded to the wall next to it.
I need to both lessen the density of the support structure and increase its distance from the surrounding walls.

Anyone know how to do this?

 

I found this, which helps, a lot but still requires some experimenting...