In KG-Chart LE for Cross Stitch, you can erase and redo backstitch lines by selecting the backstitch lines you want to remove and either pressing the Delete key on your keyboard or using the eraser tool provided in the software. After erasing, you can redraw the backstitch lines as desired.
It is possible that the program does not support PNG file format or the specific PNG file might be corrupted.
I want to erase and redo backstitch lines. How?
In KG-Chart LE for Cross Stitch, you can erase and redo backstitch lines by selecting the backstitch lines you want to remove and either pressing the Delete key on your keyboard or using the eraser tool provided in the software. After erasing, you can redraw the backstitch lines as desired.
The current version of KG-Chart LE for Cross Stitch is 1.1, which is the version mentioned in the question.