55OLED708 How to rollback to previous firmware

I need to rollback to previous firmware version for my oled708. My tv updated to .243 and it has many bugs in interface and video stream. I want to drive downgrade to previous version. Which step is to follow?

I couldn’t find a clue for that.

Hello @nohackmove this forum is for discussion only about Philips projectors, not TV. I request you to contact the TV department of Philips support. Please check the documents that came with your TV for the details.