This happens due to a COM port mismatch. Check Device Manager to see if Windows changed the port number (this happens often if you plug the cutter into a different USB slot). Adjust the software port settings to match.
: Windows 10 and 11 sometimes block unsigned drivers. If you receive a security warning, you may need to temporarily disable "Driver Signature Enforcement" in your Windows advanced startup settings to complete the installation. cutok dc330 driver installer