I love this app but…

This app is great. I had it on my old phone and I was able to make steady progress with the language by using the app for a short per of time everyday and I love the result. But my phone broke and I ended up having to re-buy it. Now it wont let me sign in. The keyboard does not disappear when Im done with my user name and so I cannot hit "done". This is very frustrating for me so if someone could address this issue it would be much appreciated.

zeezee.zoe about Human Japanese, v3.1.1