: CODESYS V2.3 is a 32-bit application. While it runs on modern Windows systems, you may need to run it in compatibility mode depending on your specific OS version.
Because version 2.3 is an older environment, you should download the version specific to your hardware brand to ensure the correct (device descriptions) and libraries are included. Brand-Specific Portals : codesys 2.3.9 download
For managing multiple versions on one PC, the CODESYS Installer allows you to add specific legacy installations, though it primarily services V3.x environments . : CODESYS V2