Much appreciated, but the download from the link was fine. I'm rather fanatical against DRM, so it's unlikely I would ever use the other keys. So feel free to give them out if you like. I've got that game itself so I'm content, thanks!

I marked the first reply as the answer, since it is technically correct, even though inapplicable to our own trade. It's all good advice, and I know more about how Humble Bundle purchases work too. All goes towards making me (and hopefully others) a more informed buyer and trader.

Ah great, but the either the chrome or the steam key is for the uodater of the standalone version,too, there is no extra key for it anywhere,except those two.

The latter is more correct, given its French origin, but I pronounce it the former way as that sounds more meaty to me in English (and also doesn't lose the GOG syllable, which is the paramount one). Interestingly enough, it has the same etymology and meaning as "grunt" in America, when used to mean a common low-rank soldier.

Interesting, thanks!