Dont like update and data too big

Since I did the recent update I cant trade silver stars for 20 energy any longer, instead Im getting 1 cash. I dont need the cash, I prefer the energy. So most likely I wont redo the cases now.
Also there needs to be the option of deleting old cases to safe data space without losing the process. The app only takes 100mb but my data is over 1gb. I dont have enough space to keep playing this game for much longer.
I used to really like the game but now Im not too sure.

Kaya 2006 about CSI: Hidden Crimes, v2.2.1