In March, Disney announced the "Disney Springs" project which is a major renovation of Downtown Disney particularly the east side/marketplace area to which the pathway from SSR near Congress Park led. Included in that project is the closing and redoing (apparently including a new bridge) of the pathway that led from SSR to DD east side. The announcement included that the entire project would be finished by some time in 2016. It is not clear whether the pathway will be out of operation until then but that risk exists. In any event, you cannot now use that pathway.
As to the other pathway to DD, see my post above. It is on the other side of SSR near the clubhouse for the golf course (same building Artist Point is in) and starts near the boat dock in that area where you can catch a boat to DD. That pathway is closer to units in the Springs and Grandstand areas than Congress Park and it takes you to the very west side of DD where Cirque is. It would seem simpler just to take the boat from the boat dock there.