Sorry, can't help you with that. I'm not even sure going by that screenshot if the source code is even part of the package you download, or if you just download a binary file instead. It also looks like SimHub is deliberately making it difficult to get a look at the source code; I'm not going to waste time on that. Try asking SimHub directly how these parameters can be changed. This is not really an Arduino question, but a question about 3rd-party software.