If it doesn’t finish the update, you won’t have much choice but to turn the Aeros off. You can try again.
If the re-try doesn’t work, next step would be to try a manual update using an SD card. Make sure you follow the posted instructions.
Aeros firmware is now at 5.2 and a beta of 5.3 can be found here Aeros Firmware 5.3.x
If that does not work, please contact Support, support@singularsound.com