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WIF is referring to the private key. Where are you seeing that

On the create second account that guy put in comments.

the first comment in this post by @robertdurst, if I use his tool and put in my private key will he be able to get my private key with that thing he created?

I cant speak for his software as I havent vetted the code myself. Might let him answer that. But the WIF that refers to is the Active Private key.

Ya I that's what I thought, that is why I am hesitant to put my private key into his software.