There is always only one instance of Opus running at once, but if you want to keep it so there is also only one window, this FAQ should have all you need:
Always re-use a single window instead of opening new windows
There is always only one instance of Opus running at once, but if you want to keep it so there is also only one window, this FAQ should have all you need:
Always re-use a single window instead of opening new windows