Usually a .bin file contained within a .rar or .zip archive.
Always back up your current channel list to a USB drive before performing a full software flash, as this process will wipe all user settings. Usually a
Connect the RS232 cable to your PC and the receiver. Ensure the receiver is powered off at the back switch or unplugged. Loader Setup: Open the GX6605S_Loader.exe . Set the COM Port to match your PC (usually COM1 or COM3). Set the Mode to "SerialDown". Usually a