Carbide Create no longer uses the machine selection drop down — it used to limit stock size and provide information for calculating chipload, but stock size is unlimited now, and feeds and speeds are from a curated list.
CC530 was just released:
Kind of mystified why you’re in Carbide Create though — it’s not required for doing “Hello World”:
If there’s something specific to your SO4 which you wish to discuss, please make a thread — otherwise, it should be much the same as an SO3 (but more rigid, w/ the ability to take heavier cuts and remove more material, and a bit larger) or a Pro (but not quite as rigid nor able to take as heavy a cut or remove as much material, but the same size, and lacking a BitSetter).