Duplicating a stitched image fails
with more than one thread
4.2 - 4.4, m32 Edition and x64 Edition only
When you apply the Duplicate selected command (Edit menu)
to a stitched image, the application terminates abnormally if you are
running on a multi-core processor.
Use the Threads tab of the Options dialog box (Tools
menu) to set the number of threads to 1 before duplicating a
stitched image. You can set it back to Same as number of
processor cores after duplicating the image.
Corrected in V4.5.