Launch 5DM City . Create a new game, then immediately save. Alt-tab out and check the of files in the directories above. The file that updates its timestamp to the current second is your active 5dm city steamemu saves location.
Inside the .sav (often JSON or protobuf): 5dm city steamemu saves
Launch:
Use a HEX editor or a simple save migrator tool, or manually change the emulator’s force_steamid.txt to match your old crack’s ID (e.g., CODEX usually uses 0 or 123456789 ). Launch 5DM City