When I try to delete a file that is in use by another process it would be extremely helpful to display the blocking processes (there may be more than 1) information (such as process name, pid, ...).
In my busy system where I may have hundreds of hidden processes finding the culprit is very difficult.
Seems like a natural thing for a file explorer to be able to do.. and yours is the best!
In my case, I used DOpus to navigate to the file. I then selected the file and used the context menu to delete the file. As far as I can tell the delete is being done by DOpus. If there is some internal delegation to Windows Shell that is beyond my control.