Frosty Mod Manager (FMM) was developed by (and later the Frosty Tool Suite team). It works by reading the game’s legacy files ( .cas , .big ) and overriding them with modded data without touching the original game install.
: If you experience "profile" errors, you can go to Tools > Manage Mod Data to clear the cache and re-enter the key during the next launch. Frosty Mod Manager - Frosty Toolsuite - Mintlify fifa 18 frosty mod manager encryption key top