Download Link will take you to MJR's DOF R3 download.
Current version (13 March 2019): This is a minor R3++ update that adds new code from Kaicherry to simulate DOF effects using Surround Sound Feedback (SSF) with bass shaker or tactile speakers (also known as exciters). This is a cumulative update that includes everything from earlier R3++ and R3+ versions.
You can install automatically from the Windows Setup installer, or manually from the ZIP file. You only need one or the other. The Setup version is highly recommended, because the manual installation process is notoriously difficult and error-prone. The Setup version is easy to use and has proven to be much more reliable than doing it by hand.