Hello Leo...
(I could not post my reply in the folder with the original message.)
I am running O&O Defrag Pro 11.5.4101, datestamped 21/04/09, with DOpus 9.1.2.0.
So far, I am not seeing any problems with right-clicks on items in DOpus. I have tried right-click>Properties a few times on items in different folders, including some in networked drives, and so far so good.