Change boot logos - PLI Jade2, DM800

Hello

I have a Dreambox DM800, running PLI Jade2 (I know it's an old image)

I want to change Boot Logo, but I can't figure out how.

I have all the files that I need (the .mvi files)

When i overwrite the originals with the new files, I restart Dreambox but the old ones still appear.

Confused