If your KPG-46 cable uses a Prolific chipset, you may need to download an older driver (version 3.2.0.0) because Windows 10/11 blocks counterfeit Prolific chips. FTDI chips are more reliable.
If you own a business with multiple radios, register your company with Kenwood’s Partner Portal. Legitimate businesses can request the download link directly. kpg137d software download
Install the USB-to-serial drivers before plugging in the cable. If your KPG-46 cable uses a Prolific chipset,