Cause it dont work

Can you fix crashes in the game zombies vs aliens 2012 for both the free and the now $6.00 version I loved the game when I was a kid and just today saw the game again so I bought the paid version I knew how much I loved the game so I didnt really care if it was the same thing as the free version. However I discovered that I cant upgrade anything without the game freezing when I went back and read the reviews I saw I wasnt the only one. please fix this because I think this game should get a lot more attention that it does.

Isackagueia about 2012 Zombies vs Aliens, v1.1.2