If you want to switch from using the basic skin data to the full skin data (including player pics) or vice versa, please follow the below steps using a file explorer app on your device (Androzip and ES File Explorer are two good free examples):
· Locate the folder ‘Android/data/com.sigames.fmm2017/files/’
· Back up the ‘save_games’ folder from inside this to somewhere safe
· If you have unlockables you wish to keep, go back up a step to the ‘Android/data/com.sigames.fmm2017/files’ folder, enter the ‘installed’ folder inside this and back up the ‘game.cfg’ file somewhere safe
· Uninstall the game
· The game should then give you the choice of which data to download once again
· Copy the game.cfg and the save_games folder back to their original locations