Beware of fake download buttons. The official Blackmagic Design website primarily offers the latest version (currently 19 or 18.6). To get version 18.1.4 specifically, you need to visit the official Support Center archives.
Digital creators have benchmarked against newer editions. The results show that 18.1.4 renders certain codecs faster due to less background telemetry. DaVinci Resolve 18.1.4 pre Windows
Once the .exe file is downloaded, follow this methodical installation process. Beware of fake download buttons