Clean recent files list
I often receive PDFs but after opening them, decide not to keep them and delete them. Nevertheless, the file name still appears on the Recent File List when I say I want to open a file for editing. This makes it harder to find still existing files that I want to edit. At the minimum, be able to click on a file name on the Recent File List to highlight it and then delete that name (via Delete key or pulldown option). Even better would be to also add a option that I can click on that highlights files on the List that no longer exist and then they would all be deleted if I select Delete.
Now you can delete any selected file from Recent list with the latest releases of Acrobat DC.
Let us know if your issue gets resolved with latest releases.