You will be able to install your Don't Starve DRM-free client by following these steps:
If purchased from Humble Bundle Store:
- Visit the Humble Store, and log in to your Humble Account;
- Navigate to your purchases/owned titles, and visit your Don't Starve Humble Store download page, choose your operating system and click on the "Download" button to download your Standalone installer;
- Install the Standalone and run the game.
If purchased from Steam, retrieve your Don't Starve installer (and game key) using the Don’t Starve DRM-free tool page:
- Visit https://accounts.klei.com/account/drmkeys and log in using your Steam account to retrieve your installer for Don't Starve and any owned DLC.
- Download the installer file for your platform and complete the install process.
- Once installation has completed, launch the game!