Had Version 2 for a year. Installed V-4 a month ago. Worked fine. Suddenly opened up a file today and the object is displayed covered with black bars. When I go to draw a box around object I get a rectangle of various thickness black bars, some with spaces. I have a PC with Win 7 64 bit. One other thing I tried was to select the sketch Icon. The screen filled with weird particles and diagonal black bars.
I have tried uninstalling and reinstalling V4 with no change.
Ken
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