Digital Light & Color

...
1) Open 3 images to be Juxtapose...
2) Open Juxapose; select an Input and a Second images; and Apply with defaults
3) Set Input equal to the resulting 2) image and Second to the 3rd image of 1); and OK with defaults

The resulting 2) image remains in History??? with the Error note: "Window in use by Juxtapose - Cannot close -- OK" and will not close even if the resulting 3) image is saved/closed...

Also, the PWP session cannot be ended unless the Task Manager - End Task is used.

...den...
Vista 32 Home Premium

Same here on Windows 10 64 bit.
It works fine when using OK in den's step 2, but with Apply the image can't be closed anymore.

Thanks - fixed this for the next maintenance release.