A number of people reported having difficulty accessing the new Preferences in Permanent Eraser 2.5.0. Considering that the Preferences was one of the cornerstones for the 2.5 release, this problem needed to be fixed so trying to open the Preferences was not so much of a delicate timing issue. Permanent Eraser 2.5.1 has fixed this problem, so the Preferences window can be opened, even when the initial warning message appears.