Downloading the software is only half the battle. You’ll need a bridge between your PC and the radio.
RT Systems sells a clone of the Icom software bundled with a guaranteed cable. For ~$50, you get RT Systems for Icom F3003 . It is far more user-friendly than Icom’s industrial software and has free, lifetime technical support. Many users prefer this to the OEM tool. Icom Ic-f3003 Programming Software Download
Official software is typically provided through authorized dealers, while some support resources offer direct digital downloads: Downloading the software is only half the battle