Before running a $10,000 titanium part on a real DMG, post your CAM code through Swansoft. We have personally caught 3 major programming errors this way that would have caused crashes.
Reinstall the USB dongle driver. Navigate to C:\Swansoft CNC Simulator\Drivers and run install_driver.bat as administrator. Reboot. Download Nanjing Swansoft Cnc Simulator 6.9.1.3 Full