Hi stef
Simple answer is yes. Draw the wall you want arced as a straight line, go to "modify wall" and enter the required or estimated arc in degrees, since ver 6 release you may have noticed a small arrow on 1 side of the walls as you highlight them, this indicates which way the wall will arc. Or use can use your mouse, place the icon near the arrow of a highlighted wall,left click and drag the wall to the arc you desire.
Hope this explains it.
Mike