I'm Alessandro from ProgeSOFT support team. It's a while since our customers begun to complain about particular problems with our CAD, where one or more files become 0 bytes in the Program Files folder. Our software is not executed as Administrator (which means that we cannot erase any file in this location) and since all reports come from customers having a McAfee Antivirus, we are lead to think that McAfee may be the cause (or a contributory cause). Is anyone else experiencing something similar? Every hint is greatly welcome.