To connect your radio to the computer, you must have the programming cable. HYT HT-508 - TC508E programming software v.2.02.10

compliance and allows users to customize channel settings, button functions, and power levels. Atlantic Radio Communications Corp. Core Programming Features

The official is not generally available as a free download for end-users. While the manufacturer, Hytera, provides a Download Center , direct access to professional programming software is typically reserved for authorized partners and dealers. Software Availability and Sourcing

Contact a former HYT/Hytera radio dealer. Provide your radio’s serial number. They can email you the official installer — often because the software is no longer sold.

I should also mention general steps for downloading software legally: visiting the manufacturer's website, ensuring the operating system compatibility, and reading the end-user license agreement. It's possible the user is using an unauthorized third-party site for the download, which might be unsafe. Warnings about malware and phishing should be included.