[lkmiller]

Gah! They are definitely using something else to generate the keys now. I changed my default cc again (to something I'd never used before) and this time the tools no longer worked for me. I changed it back to the original card and now that no longer works either.

So if you've recently changed your billing info, you're out of luck for now. Even if you switch back to the previous card.

However new and previously downloaded books still open just fine with Nook for PC. So hopefully someone can figure out a new crack.

ETA: I downloaded the files with the Tampermonkey script and with Nook for PC.