Thank you for a great program! I have been using DOpus 12 heavily recently and it works great.
This is possibly a large change request, but I do think it would be a great feature maybe for DOpus13:
Add an option to click on the "All items" text (or some other button) in an in-progress copy dialog to open up a detailed full list of the filenames of all the files remaining to be copied within the current operation and/or any others that are queued up. I envision something similar to the Filezilla FTP upload/download queues or other programs like syncback that show detailed queues.
This would be especially useful for large copy operations and/or long FTP transfers. A simple usecase would be coming back to multiple long copy operations after hours or days and having forgotten what exactly one started.