i-cut Preflight crashes when rotating objects with the Transform tool, while holding the Shift key.
In i-cut Preflight, you select the Transform tool, press and hold the Shift key and then click and drag near an object's handle to rotate the object. At that moment, i-cut Preflight crashes.
The problem occurs when in i-cut Preflight > Preferences > Editing tab sheet, the option Constain Angle has the value zero degrees. Change the value to e.g. 90 degrees and the crash will no longer occur.