"MPXTool" (specifically version 2.04) is a legacy software utility primarily used for . It is highly popular within the RTL-SDR (Software Defined Radio) community for visualizing the baseband spectrum of FM radio broadcasts, including pilots, RDS data, and stereo subcarriers. Content & Key Features
Unlike legitimate software from manufacturers or developers, pirated tools offer no customer support. If something goes wrong, you’re on your own. mpxtool v204rarl
Depending on what you are trying to achieve with MPXTool v2.04, there may be safer, modern alternatives available: "MPXTool" (specifically version 2