When I plug in a USB drive while my VM is running, Parallels offers a dialog lightbox asking whether the USB drive should associate with the Mac or the VM. Once this choice is made, Parallels tends to remember/respect it on every subsequent reconnect. Sometimes I want to change this association, but I don't see how I can. Is there an easy option to change the USB drive's association on the fly? Or do I need to select something to make Parallels forget all USB associations and start over?