"Migration Assistant" for upgrade from 0.5.4 to 1.4 on x86?

I know, i am very late,
but I like to upgrade my Umbrel 0.5.4 on Debian Mini-PC to umbrelOS1.4.
My question:
Is the use of the “Migration Assistant” still the way to go or are there other, maybe better/more safe solution?
I am very afraid to loose my sats in my channels.

Thanks for your advice.