Additions:

1. FDK (Fusarium Damaged Kernels). This may be useful for those who work with Fusarium head blight ('scab'). Unfortunately, the unit is not documented. A help file will follow. A special Threshold Panel (called FDK) was added.
2. Saving/loading the rectangular AOI (under options). An image window must be open.
3. ability to re-use the Rectangular AOI for successive images (as long as the image window is not closed).

Fixes: Very minor bugs were fixed.