The other thing to do is set up your layout as you like with the Drag Drop disabled and then save that to a UI dot.  Every time I start up a scene that I did not save I click that dot and it restores all my settings to have the drag drop turned off.

Poser 5, 6, 7, 8, Poser Pro 9 (2012), 10 (2014), 11, 12, 13, 14