I tried to install the app according to this instruction:
HOW TO INSTALL APK AND GAME CACHE GAMES/APPS:
1. Ensure you do not have already installed the game/app you are going to install.
2. Prepare your Smartphone (or Tablet) for external installations.
3. Download the APK and the GAME CACHE files.
4. Move the APK file to your phone. (if you downloaded the file from your PC)
5. Install the APK file.
6. Extract the GAME CACHE
.
7. Move the GAME CACHE to your Android Device
8. PLAY!
App launched but as free version. Moreover I don't see, how in this instruction lucky patcher is engaged.
So, I watched a few videos on YouTube to understand how patcher works.
But, according to those videos, I don't need any cache to receive full acces to an app. I just need to rebuild an app with patcher and that's it.
Still, this approach also failed. I have read a bit more topics about the problem and it turned out that lucky patcher is quite useless for on-line games.
Didn't I miss something obvious?
And, no my phone isn't rooted. As I have read, it's quite dangerous operation.