Weird, I can't claim it while it's free.
Viewing post in Witches and Bandits and Swords (Oh My) comments
I don't know if this is too late or anything, but the same thing happened to me. The Download Now button at the top and the Download or Claim button under Download didn't work. However, I use the app on my laptop, and clicking the Buy Now button at the bottom right corner of the screen worked for me.