Hi @chev,
Firstly welcome to the forums, I believe you have done the setup of your stick correctly. The debugging suggestions others have suggested to you would have lead you to the same place (although, for other issues you may want to install Java 8).
I arrived here because I’ve just run into the same problem and unfortunately it looks like the Z-Wave Gen5 is incompatible with the Raspberry Pi 4’s USB ports.
See: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=245031#p1502030
To get it working, you’ll need to use a USB2.0 hub between the Pi and the device.
Hope that helps!
Ben