How do I open Candy Crush Friends Saga models?

[ItsMeGamerAndBFDIer7]

After downloading a .apk of the game and extracting the contents, I went to where the models are and I found them in .ffm format. I used Chargeur FFX to open the model, but it resulted in an error to terminate the application. How am I supposed to open the models? I wanted to get the models because there were some Candy Crush Saga and Soda Saga models out there.