Good catch on the port address. The only other gotcha I can think of off the top of my head is your pin assignments. Under "Config | Ports and Pins" check your 'Motor Outputs' to verify your step and direction pins are correct (for xylo boards, the default is incorrect) and also check the ins to verify the software is looking for an active low (if your test switch closes a path to ground). If you get the switch to work but the motors still won't jog, check the "Mptor tuning" section under "Config". Using the Pacific Sci steppers I bought with my Taig kit, I needed to set 'Steps per' to 16000 (20 in/min for velocity should do for testing).
Actually, there is one more HUGE gotcha that springs to mind. Art is righteously concerned with industrial safety and wants to be certain all of his customers acknowledge the imperative. To this end, if you don't have a physical E-Stop switch wired into the circut, you will need to set up the software to bypass the default settings. To do this, go to "Config | Ports and Pins | Input Signals" menu and drop down the list by two 'pages'. Find the 'E-Stop' line. I don't know what the optimal setting for this should be, but I find turning all the red Xes into green checks seems to work pretty well.
Good luck!
-K