Pretty straightforward question. I'm wondering if once you purchase a license for one if you get any kind of upgrade for free. Although I highly doubt it. Also I've been reading DX11 isn't that a big of a deal compared to 10 anyway. Sooo...
I dont know about the upgrade but the basic edition is only $7.
You can only run it on performance settings and can only view your score online, but every body submits there scores with performance setting.