website for updating RB

According to the following website, it seems that RB can be updated.
http://www.cedrus.com/support/rb_series/tn1055_xid_history.htm
But I just cannot find the website to download the updated software. Could anybody kindly help out?

If you have purchased your RB-series response pad within the last three years, you are running the newest firmware. If you are using a response pad with an older firmware and need to reconfigure, you can find the instructions here: http://www.cedrus.com/support/rb_series/tn1042_install_rbx30_win.htm