Win VST - VST plugin for 32-bit Windows and 32-bit host audio applications running under 64-bit Windows. This download requires a VST-compatible host audio application to run.
Win64 VST - Same as Win VST, but for 64-bit Windows and 64-bit host audio applications.
Win GUI - Standalone 32-bit Windows application (compatible with 64-bit Windows).
Mac AU/VST - AudioUnit or VST plugin for Mac OS X version 10.4.11 and later, universal binary. This download requires an AudioUnit- or VST-compatible host audio application to run.