Sooo.. sometimes the Emulator starts and sometimes not?
I deinstalled the Emulator over the Uninstall Feature, Deleted everything in %appdata%
even for Luma3DS and Citra the same.
When i restart my PC, i can like start the emulator one or two times and then it just never appear again.
so i need to "deinstall", install again and then it works again.
Its a little bit annoying.