The Bandlab Cakewalk release was opened to public domain by Gibson. I'm not extremely experienced but it's been doing great work in post-production with my Tascam DP-24SD tracks.
Also: I pretty easily achieved a connection with my XW-P1 to the Win7 Cakewalk installation and was recording MIDI right away. Shaun's original post specifies a "simple cheap software solution," and I'd point out that this is sort-of in the middle: it's free full-function, but -- being a real capable DAW -- I might not exactly call it "simple". I don't think it's out-of-range with anything else available, however, when it comes to difficulty. Like anything else, it can be learned, and I'm real happy to have it.
https://www.bandlab.com/products/cakewalk