Keeps crashing;(

This is a great app really good in detail so I wanted to get more. I got the full version its was amazing the picture was clear and perfect. While I was looking at the pictures it starting to slow down, then it crashed. I tried again and again but it kept crashing I tried everything I would like a update or somthing to fix this please!
All in all a great app

...474199093124578)(/ about Backgrounds++