Released around April 2014, version 4.74 was one of the final stable iterations of the v4 series. Its core components include: µVision4 IDE

Unlike MDK 5, which requires downloading device packs for each microcontroller family, MDK 4 includes all supported devices in a single installation. This can be convenient for offline installations or air-gapped development environments.

Are you using this for a or a specific hardware board ?