Sounds like the PC or laptop is still powered up when the usb lead is disconnected from the cutter.
Basically what happens is when you re-connect the usb lead the pc will see it has a new usb device, so in production manager were you had set up the driver , probably set to USB000 this would have changed to USB001or 002 or 003.
So in production manager you would need to change the driver from USB000 to USB001 or USB002 or USB003, depends how many times you disconnect the usb lead from the cutter while the pc is still powered up.
Regards
Nigel