You can now reclaim your rewards by clicking on this link:
If you submitted your survey before August 14th, the email will be the one you entered in the survey – otherwise, use the email you used for your Kickstarter account (you can change it in account settings for the humble store). Paypal backers should use the email they used to back the game.
And a reminder: The Pyrodactyl developer stream where we answer your questions and show off a bit of Unrest will happen at Sunday, 18th August, 5 PM GMT at http://www.livestream.com/chocolatehammer. See you there!
Cheers and love,