All supported platforms, as in you don't have to pay a separate license fee to run it on one of the other platforms they support. Yeah, I'm not happy having to

All supported platforms, as in you don't have to pay a separate license fee to run it on one of the other platforms they support. Yeah, I'm not happy having to keep a copy of Windows for graphics software either, but that's a different issue. If you only have Linux or some toaster running NetBSD, then it's pretty simple: don't buy it.