A: No. KPG-137D is strictly for NX-1300DU series. For NX-1200/1300 non-DU, use KPG-135D or KPG-141D.
A: Only for downloading the installer and for online license activation after major updates. Programming itself works offline. kpg137d software upd download
Important: Kenwood software is licensed and not available for free public download on general file hosting sites. Attempting to download "cracked" versions from third-party sites poses a significant security risk to your computer and may damage your radio. A: No
To download the software update legally and safely: may brick your radio
Important: KPG137D is not freeware. It is a paid, license-managed product. Downloading cracked or unauthorized versions from file-sharing sites is risky—they often contain malware, may brick your radio, or fail to communicate correctly with the device.