YDT v2.0 to v3.0, depending on the generation of the vehicle's CAN-bus or K-Line communication system. Hardware Requirements for Installation
Do not plug the diagnostic cable into your PC yet. Most diagnostic cables use an FTDI chip. Download and install the latest FTDI Virtual COM Port (VCP) drivers. This allows Windows to recognize the cable. Step 2: Install the Diagnostic Software Yamaha Diagnostic Tool Software Download
Finding direct official "downloads" can be tricky as Yamaha often distributes professional software through authorized dealers or physical media. However, official mobile apps are widely accessible: YDT v2
To help narrow down your search for the right setup, please let me know: What is the of your Yamaha vehicle? YDT v2.0 to v3.0