This is a legacy version of Waves software. Most modern systems and DAWs are now compatible with much newer versions (V15+).
: By using a single VST3 slot to handle multiple plugins, it can reduce CPU and memory overhead compared to older VST formats. vst plugin waveshell-vst3 9.2 free download
If you use a custom VST folder, you can copy the .vst3 file from the default location into your preferred folder. This is a legacy version of Waves software