Situation: Have backups from before 17.10 upgrade, and want to restore a file or two from those backups.
When you go to Deja Dup to restore a file you don't get a choice as to where to restore from. You click on the restore button and either nothing happens or it just says "Restore from Where?", says "Backup Location" and then nothing is clickable in the window.
This is the same issue as 981272, but I can't add a comment saying I have the problem also, I can only provide an answer which seems counter-intuitive/productive to a discussion forum.
Attached is a screen shot: