Darkys checkbutton not possible to click?

Hey people.

I got a fast question.
How can I fix the check button in Darkys keychanger/checker? For me its lighter gray and I cant activate it. I tried it with 1m, 500k and 100k keys.

Thanks!

- No.2

It takes a while to load all the keys in the program, maybe your pc needs longer to finish loading.
Try with just ~1k keys and see if you can click then.