Unlike the hardware, the WiN plugin requires a DAW host. You cannot open it as a standalone .exe to just jam without a sequencer (though you can use a VST host like Cantabile Lite for free).
Switching the synth into Juno-106 mode instantly transforms the interface and the sound. You get that glassy, chorus-heavy pad sound that defined 80s pop. Switch to SH-101, and you have a snarling, monophonic bass beast. Roland Cloud SYSTEM-8 -WiN-
: Provides up to 8 voices of polyphony for the native engine, allowing for rich pads and complex chord progressions. Unlike the hardware, the WiN plugin requires a DAW host