Cool one! I'we started to mine it. But how/where to mine 31 on windows?
I also want to know but nobody answers. Cant find a proper solution anywhere!?

No, because there's no way to do that for now unless you're an ASIC developer.
The Cuckatoo31 (C31) is an ASIC-friendly algorithm but I don't think there are any ASICs at the moment.
Maybe in theory people would be able to use GPUs to mine C31 until ASICs appear, I don't know but the difficulty of C31 could be that high that even if fewer GPUs mine it compared to C29 it's not as profitable... I repeat MAYBE... I don't know.
What I know is that C31's hashrate is 0 at the moment.