Using today's update (5.4.8208) with MB 3.5.8205 P, I'm finding that is a selected preset has no files that meet the criteria, that upon clicking the 'preview' button AS&R locks up. All presets are grayed out and the only way to exit AS&R is to 'x' out. 'Save all and close' will also exit AS&R.
I've been testing with the two "Remove leading zeros in Tag 2>" presets.
Let me know if you need more information.