Been doing a little reading on the version. Looks like they've worked on the efficiency of the app to work with USB controllers. Though it's significantly faster, I'm not sure my machine would benefit much from it. Pricing is about $25 more for the Hobbiest, another $25 if you need to use the parallel port. Looks like with mach4 they've changed the license to be coded to the PC's id too, so the software will only run on one pc. So sounds like unless you purchase more than one license you'll have some downtime if the pc goes down. I guess that is the point though, to get those that are using it commercially to pay the bucks for uptime.
To a small child, the perfect granddad is unafraid of big dogs and fierce storms but absolutely terrified of the word “boo.” – Robert Brault