Hi Lars,
You can also kill the process via the Command prompt. Run the command prompt as an administrator
First you need to check what the PID (Process Identifier) is of you process to kill and you can do this by following command.
netstat -ano | findstr : port number → nestat -ano | findstr :8080 (port number that you have specified in the Studio Pro under settings→ Configurations
This will give you a list of Processes running on port 8080 (see example below)
After this command you know your PID check where the IP address contains your port number → this is your local server running
You can kill this with the following command:
taskkill /PID typeyourPIDhere /F → taskkill /PID 21888 /F
I hope this helps you a bit with shutting down your local servers.