Hi David, that’s the exact go-to area for me to get old versions. Its where I see InCopy 2015, Illustrator 2015 and Photoshop 2015, but not Indesign 2015. (I also couldn’t find it a few months ago, but finally decided to write and ask). Is it listed in yours? (I’m on Mac Sierra.) My “Install” buttons do not include drop down triangles to pick older versions, like the article you pointed to.