Downgrade Firmware?

Hello,
Finally got the M800 connected after laying around for a few years now.
First got this message which makes sense:

But this one I am not sure about:

Ecu version V50.xx vs V3.53 ????
Still OK to continue?
Finally got the M800 connected after laying around for a few years now.
First got this message which makes sense:

But this one I am not sure about:

Ecu version V50.xx vs V3.53 ????
Still OK to continue?