ok, I found it by myself. It was a stupid error by me. I made the cue change, but I forgot to edit the start.sh also........Now it works. Big thx to @Ratte for this instruction.
I only have to configure the buttons for my snc30, this is kind of strange.

I have the same problems like @lulu13 , the games do not start, there is only a black screen. After a few seconds, I am back in ES.
I did everything like in the instructions. Who can help?
I use a RasPi3 with Recalbox 4.0.2