Wytron DVD-319 Ver 3.21 Firmware. Anyone have it please?

Good evening all

I made the mistake of upgrading the firmware on my Wytron DVD-319 controller from 3.21 to 3.23. It no longer works!

Does anyone have the Version 3.21 firmware file? I have tried the Wytron Website but they cannot help.

If anyone could help it would be appreciated. I have a huge DVD copy run to complete and I am running out of time.

Cheers

Bernie
London England