1.06: Enlarged what constitutes "close" to a center for starting tumble drag.
1.05: Fixed file chooser so that other directories can be traversed.
1.04: Implemented "Cancel Undo" command and added "View Changes Undoable" checkbox on Toggles Menu.
1.03: Allowed dragging with mouse outside window.
1.02: Improved animation for mirrored twists.
1.01: Introduced Mirror Prefix for reflecting twists.