Because this is legacy software (circa 2012–2014), it is no longer hosted on official developer sites. Reliable sources include:
Security Warning: Always scan downloaded executables with VirusTotal. Some malicious actors bundle this tool with keyloggers. The official V1.032 should be approximately 482 KB in size and have a digital signature from "GX Labs, 2013." Gxdownloader Boot V1.032
Cause: The device is not in bootloader mode. Fix: Re-enter download mode. For stubborn units, add a 10K pull-up resistor on the USB D+ line. Because this is legacy software (circa 2012–2014), it
Press 6 to exit. Power cycle your target device (disconnect USB, wait 10 seconds, reconnect). The device should now boot normally. wait 10 seconds