This may be a Windows-only issue, but in 1.1, when you run the simulator from the command line with a build path as an argument, the build appears not to open, and the simulator starts with the system launcher instead. What is actually happening is that the build does open, but the launcher is open…

Is the first version of the SDK you installed 1.13 by chance? It sounds like your preferences aren't saving so it can't find the correct SDK which is noted here .