Have you used GxDownloader for a specific router model? Let us know in the comments below!

Connect your receiver to your PC via the RS232 cable. Do not power the receiver on yet. Configure the Tool:

⚠️ Do not disconnect the cable or power off the device until the progress bar reaches 100% and displays "Completed." 💡 Troubleshooting

Are you trying to or just looking to upgrade the current software ?

: Browse and select the gx6605s-generic-sflash.boot file (usually included in the tool's folder).