You will see Bayern, Manchester United, Real Madrid and Barcelona missing their best players because they are moved in Portuguese clubs.
Step 1Move the .fmf file to your editor data folder:
\Documents\Sports Interactive\Football Manager 2015\editor data
Create the "editor data" folder if it doesn't exist.
Step 2Start a new career game (won't work with classic mode).
A little pop-up window will come up that says there is X enabled editor files. Click OK.