C7824WIP overexposure after firmware upgrade

My C7824WIP have overexposure problem after upgrade firmware to version 48.53.72.103. Can I adjust the exposure or is it firmware problem?

Dear Sir/Madam,
Thanks for your messages, the firmware is no problem, sometime lack of illumination can easily cause a photo to receive insufficient exposure.

VS-support1 replied at 2018-9-6 15:21
Dear Sir/Madam,
Thanks for your messages, the firmware is no problem, sometime lack of illumination ...

I don't think so, it is not lack of illumination but it is too bright. No detail can be seen it the bright area.

The camera has got the problem since i upgrade the firmware. Could you suggest how can I downgrade the firmware or adjust the brightness?

warakora replied at 2018-9-6 15:46
I don't think so, it is not lack of illumination but it is too bright. No detail can be seen it th ...

Dear Sir/Madam,
The attachemnt is the firmware zip file, please unzip it first.
How to downgrade, please follow the steps below: 1, power off camera, prepare a SD card and format it,
2, copy unzip firmware file to SD card, and then plug it to camera card slot,  3, power on camera.