It is regression in MD skins, selection in fact works, but is not displayed correctly, thanks for reporting, tracked as https://www.ventismedia.com/mantis/view.php?id=15933

Are you using a List view or Grid view? I don't have a problem in the List view using the steps as you describe. The problem is in the Grid view (refer screenshot in link)

I went into artist, selected an artist .. got list of albums, selected album selected some tracks.
Not sure what else would be different

Yes, If i open the album in it's own window from the view described in the link, Ctrl click works but it does not work from the view in the link. In effect i have to select the album twice.

I can select multiple tracks from an album using Ctrl-Click..

[url]https://1drv.ms/u/s!ApGytY_cYuPxonw61f712FsHtERh?e=GMUsUI[/url]
In this view the album & tracks are presented but i cannot select a group of tracks to play. I am restricted to playing the whole album or one track at a time.?