Thank you, @Ben!
Now it’s running and syncs the testnet block chain 
Does anybody have some testnet NuShares and wants to have me test something?
If yes, here are testnet addresses:
sT8vHdEDcQqQrgTDwu34DkjF5uHfa7f7E6
sbNVHkMA7vCP5LFNqAcBTgLgyYGPuqhJvL
sPmJGLDfqJTD62n782WNyJB2VSajoi4inE
sSKVoYvaB7ZD7rAgjd1stoLQEcMiDQZACy
sJXFiKrxRyKUhhdERqHsRkdApRPHfi5Kev
I’d create some NuBits addresses as well, but I don’t find the command to switch the walletunit…