New
#1
Think you find they are in the ribbon. Click on the down arrow beside question mark on right.
Maybe classic shell will offer an update to restore.
Ken
Remove Classic Shell and see what happens when you drop open the Ribbon. If they are not showing with a third party tool installed, you remove the third party tool or roll back before this happened. Get rid of Classic Shell, file a ticket with them or see if they are aware of the tool messing up the XML code and have a fix planned.
Probably not...
Classic Shell no longer in development, and now open source
I'm guessing that, after 'Creators Fall', the Details Pane is still down the right hand side? It's for that reason I'm keeping Classic Shell which allows you to have it along the bottom. A pity the old fashioned yellow buttons seem to be unavailable. Thanks to you all.