Presently ACES is available for download via our Google Code Repository (click here). In the future, we aim to have an ACES binary for download. Till then, please use an SVN client (Subclipse, an SVN plugin for Eclipse) to download our code, and run it using Eclipse.
Please ensure that your build path in eclipse is set like the following picture:

To run, please use Diver_LES as the main class file. Please make sure to set the run arguments as follows in Eclipse:

ACES does require 2 Gigs or more of RAM to run. This is due to the number of language libraries that must be in RAM during run-time.