You're looking for information on Global Mapper 23.1 and its download. Global Mapper is a popular geographic information system (GIS) software used for mapping, spatial analysis, and data conversion. Here's what I found:
Official Trial: You can download a 14-day free trial of the latest version directly from the Blue Marble Geographics website.
Before downloading, here is what version 23.1 introduced:
3D Mesh Viewsheds: Generate 3D mesh features that display radius as a hemisphere.