H2D Prime Tower with PETG and PLA exterior wall prints alternately

PETG and PLA dont bond well hence we use it as a support. I have a one color PLA print with PETG support. With the latest update, In the Prime tower I see the exterior wall of the tower it is printing both PLA and PETG on top of each other and having issues. it is a tall print so I would like the extra prime tower support but the exterior wall is looking bad and very stringy and just waiting for it to fail. Is there a way to not have the intermixing layers and go to the half one material and half the other like the interior of the tower is? left pic is one that is printing both materials over on another and failed. The middle and right show how there is only one color in the outside wall vs both

Is there a way to select what colors go where on the tower?