When will the DRM free version on humble store be available?

[Diya]

You need to buy it from Crate’s website directly - it’s operated by Humble though. But if you buy via their website, you only get a Steam key.

Contact their support and ask for a refund, if you want to switch.

I bought it from Crate’s website directly. Then, I got redirected to humble which gave me a key only for steam. They said ‘copy this key into the Steam client.’