I want to download troll trouble and pre ordered from gog. Where do I find the key to do this?

No key required. Register your game and it should show up in the Downloadable Content section of the launcher. Otherwise, some kind of error occured.

no I think they mean where is the key it asks for when you go to register your game thereby making it possible for you to download it

My Registration Key was included in the email confirming the pre-purchase (not just the preorder) from GoG themselves.

No, I got the key to register it and I did... ir asks for a pre order code?

ahh, i just didnt put a code in and clicked download and looks like it is working.

Thanks

You don't actually have to enter in any "pre order key." Simply click download below it and it should start.

Also remember, once you download it, you have to click "install" in that same menu as well.

that's actually what I was referring to since I can't find it myself and it said I would find it in a confirmation e-mail

Go to this page if you didn't get an email

http://www.gog.com/en/page/my_tw2_info/

Thanks also I tried to reset my password as nothing I put in would work and tried to get two confirmation e-mails sent to me to change it but as yet have not recieved anything at all