Apple just learned that Super ATM, version 3.6 works fine with the AV
computers (660AV and 840AV). Upgrade to version 3.6 and there should be no
more problems.
In regard to Hardware System Update 2.0.1, that release does not actually
load anything on the AV computers. You can run it, but nothing will
change. It would not have fixed the problem you were experiencing.