Hi Rolski,
Thanks; yes those were the steps I followed.
It took me while to figure it out. It was Defender Smartscreen that was stopping the downloads. Some persistent right clicking in the download manager of Edge and I was able to download the common installer and the configuration app. So far so good.

Does anyone know where the Meridian Sooloos Configuration app has gone? I'm thinking about adding an MD600, but need to select which of my drives will be the core.

Thanks, Jan.

MS200, G65, 2xDSP5200SE, DSP5200SEHC, HD621, Oppo BDP103,
MD600, MS600, Accuphase 203, 2xTotem Mite
various Sonos units (MC200 in storage)