The software usually arrives as a zipped file. Extract it completely to a local directory on your Windows PC.
For simpler field changes, Hytera offers , an Android app that connects to the HP785 via USB-C. HyTool allows for quick on-the-go programming, but it is not a replacement for the full CPS. hytera hp785 programming software download
The official Hytera CPS (current versions include V3.0.x) allows for deep customization: The software usually arrives as a zipped file