17. Instruction of Upgrading the Q5 System Firmware

Click here to know how to ugrade the Q5's System firmware

Here is something download links: 

USB DAC Driver（v4.47.0）: Click here to download

Q5 sysetem firmware file - v0.52: click here

Q5 system firmware upgrade tool: click here

If you meet any problem in upgrading,  you could contact FiiO (support@fiio.com) about that.