Thanks very much. There was nothing remotely objectionable! It was about now (with November update) having available the options not only to select where to download new apps, but also to move them between drives --- which I have now done, greatly relieving the demands on my small capacity SSD. There is also the option, in some cases, to MODIFY and I asked what this meant, and why some apps are different to others in respect of MODIFY and the choice of saving destination.
I posted in Windows 10 News or in Windows 10 Support. The content was clear from the title.