Okay strange, without being able to reproduce it here we're a bit stuck, but if we make any changes that might effec this we'll let you know.
Thanks!
Researched more. Made settings backup. Totally removed with Revo Uninstaller. Rebooted. Installed the old vesion like 10.x, clean install. It's the magic. I saw tray area on left display. Restore settings, magic #2, no tray area. Looks like this is Windows task bar, not DF