This firmware is only for DX3Pro+ and is NOT applicable to any other models including DX3Pro. If this firmware is flashed to other models, it will immediately cause the product to be unusable and unable to repair by yourself. If the firmware of your DX3Pro+ is already V1.28, then your DX3Pro+ needn't this update.
The firmware version of your DX3Pro+ could be check at this tool.
What's updated:
Fix some known bugs.
Firmware and tools for Windows: Download here (Firmware and tools for Windows: Download here (This update requires a Windows 10 or higher OS with driver installed. Drivers could be download here).
Firmware and tools for MAC: Download here
If you have questions about the update of your DX3Pro+, please contact us before updating this firmware.