Now it is my time to ask questions
Is there a way to do it? I want to be able to have standalone, but also to connect to it from the same PC if there will be need.
I now that I can make them to use different ports, so they will start normally (without socket/protocol is in use error). But then they will not see each other, logically enough.
I can change something in the source code, if someone has the idea what it could be.