dont know whats going on with this app

I had this app for a while now and I really enjoyed it until it started to crash everytime I would try to play online. I deleted the app thinking that it would solve the problem and when I tried to reinstall it said that I had to pay again to get it back. It never happened to me before whenever I deleted an App and reinstalled it after that they would ask me to purchase it again. Im really disappointed about that and I hope that I can get the app back without having to pay a second time for it.

Eeeeeeeeeveeee19 about Caylus, v1.1.0