A straightforward but often overlooked method is to check the physical documentation that came with the switch. EZSwitchSetup was frequently included on a CD or DVD in the original switch packaging. If you still have the original kit, the software might be right there on the disc.
The setup computer is the machine where the EZSwitchSetup software is installed. The requirements are modest: brocade ezswitchsetup v710 download 2021