Use a hex editor (like HxD) to open a small .3di file. Look for headers like [INTERGRAPH] or [LOCK_V2] . This tells you which unlock mechanism is used.
For gaming simulators, using the tool typically involves modifying career data. 3di unlocker
The Ultimate Guide to 3DI Unlocker: Unlocking Potential in 3D Content Use a hex editor (like HxD) to open a small