I'm just trying to understand licenses, but doesn't the choice of MIT contradict the inital "non-commercial purposes" as MIT says 'including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software' - Therefore, the non-commercial purposes is actually void and I can use the software to the limits of MIT defines? And because it is already MIT, they can relicense only future software but not this piece anymore?