Welcome to the group.
There are a couple of places that I know of for using USB with CNC controls.
One is Deskcam
and the other is a stepper driver board utility at.
There is no current CNC control software that supports this USB board at this time.
The parallel port is going the way of the dodo bird. There will be other methods of controlling CNC's through the USB that currently exist or will be invented.
There are large number of PC's around with parallel ports that can be gotten for a song. It might be better to stay with "old technology" for a while and use battle proven software >> Mach 3.