Thank you very much for your reply.
I already tried turning off both, but that didn't change anything.
That doesn't make any difference. I also tried dragging and dropping from one program to the other one, which lead to a normal download in the target program - fast in Explorer and slow in Directory Opus.
I didn't observe anything of interest when displaying the processes of all users in the Task Manager (sorted by CPU usage).
Any other ideas?
Cheers,
Jan