as a digital download. Unlike some software you can just grab and go, this required a "license key" that usually arrived via email after a manual approval process. The Setup Struggle
KPG-137D is typically distributed as a commercial product. While legacy or community-shared versions exist on sites like Radioscanner.Ru , official and secure downloads are primarily available through authorized dealers: : Offers the software as a digital download.
Primary support for the TK-2000 and TK-3000 series, including the TK-U100 .
Based on the keyword string provided, you are looking for information regarding the firmware/software update for the programming software, which is used for Kenwood radios (specifically the NX-320 and NX-420 NexEdge series).