Download your platform's build above. The macOS .dmg runs an installer that puts the AU, VST3 and the AAX for Pro Tools in the system plug-in folders; on Windows, run the installer or unzip the VST3 into your VST3 folder (Pro Tools on Windows: the separate AAX zip goes into Common Files\Avid\Audio\Plug-Ins); on Linux, unzip into ~/.vst3. Rescan plugins in your DAW and load BR108 on any track: a stereo track gets LEFT and RIGHT strips, a mono track gets one. The macOS build is Developer ID signed and notarized, the Windows builds are Authenticode signed, and the AAX on both platforms is PACE signed.