Under Windows 8.1 and DVBViewer v5.3.1.0
1. Left-click and hold the left key on the Titlebar, the minimize and maximize buttons will disappear, and the close button shrinks.
2. Drag the topmost (or bottommost) edge of DVBV window downward to the minimum (aspect ration will be kept on the latest version), DVBV application will crash. But dragging left or right edge to the minimum, DVBV app won't crash.
Please check.