Unfortunately not. In THEORY MV is multi-platform, since it's just js running in a web browser. Just hit the button and you've got it exported to Windows, Linux, or even mobile! In reality, a lot of things break that very fast. I'm using a number of plugins that won't work on mobile at all, and several others I suspect won't play nice with non-windows settings, so I don't currently support any of that.
If you want to mess with it of course, you're welcome to. The "real" game is the index.html file in the www folder; the exe is just the browser than runs it. It won't load on say Chrome by default, but it WILL run once you tweak some security settings for local pages. In my experience the performance while running this way is poor, and any number of bugs may crop up, but if you want to mess with it, you're certainly welcome to.
That said, if you DON'T want to pay $10 just to tinker, I entirely understand. Officially though, this is Windows only, not by neglect but by necessity.