What changed in 2006?

[maniac]

If he shares this with another computer of his/hers (or reformats), I presume they have to transfer a license file of some sort, right?

If he do so, he would just have to enter his password once again (from the new computer). Then the DRM server will be connected and the thing will store a 100 year license on that new computer. So, again, the only thing you have to do is to enter your password ONCE.

I don't know about VLC player or linux/mac players, you can ask around. I would like to learn about this, too.