Do you already own a (like KESS, PCMTuner, or KTMBench) to read and write the files?
Toyolex 3 is a specialized post-processing software designed to edit binary files from Toyota and Lexus Engine Control Units (ECUs). It is highly regarded in the tuning community for its automated features. Key Features of the Legitimate Software
The software does not communicate directly with the vehicle via OBD. Instead, it operates on "binary files" (.bin) that have been read from the ECU using a separate hardware flasher.