Most "free" downloads found on the web are modified versions of the software. These usually include a "Keygen" (Key Generator) or a patch file. This software removes the need to purchase an official license activation from Delphi.
Delphi Technologies (now part of BorgWarner) creates proprietary software sold via licenses. Officially, there is no "free" download supported by the manufacturer for the general public. However, legitimate installers of the 2015 R3 version exist on various file repositories and diagnostic forums. These are often used by professionals who need to reinstall legacy software on older shop laptops. Delphi Cars 2015 R3 Download Free