If you are using windows, it is very possible that the driver for the bootloader specific device failed installation. Please check device manager, and look for the bootldr device.
If the bootloader is found, please try re-installing the graphical user interface. If that doesn't help, please try the following:
Manually installing the driver by specifying the location manually
If that doesn't work, then try using the freely available zadig tool with these instructions:
Manually installing the driver with Zadig
If the device is not found in device manager, please contact support by following this link:
Contact Support
If the bootloader is found, please try re-installing the graphical user interface. If that doesn't help, please try the following:
Manually installing the driver by specifying the location manually
If that doesn't work, then try using the freely available zadig tool with these instructions:
Manually installing the driver with Zadig
If the device is not found in device manager, please contact support by following this link:
Contact Support
The Contact Support link does not work
Thank you, I've updated that.