Summary: Can you please fix ACA every time I render a scene or create an AniPath the program crashes

Description: When ever I create a complex render with model of 2gb or more ACA becomes very slow and then wont respond then crashes.
I am trying to operate a business and I spend hours re doing work because ACA crashes.
I am running a HP Elite i7 with windows professional and 64gb Ram.
I am considering swapping software but I don't know what to buy.

Product and Feature: AutoCAD Architecture - Display System

Submitted By: John Holding on 11/25/2013