Problem with splitting taskbar icon of two Matlab process.

My pc system is win7. My Matlab version is 2015b. For many times, I have to launch two Matlab process simultaneously. When I minimize the Matlab window, the taskbar only displays one icon for Matlab and the scripts. I want to minimize these scripts in two seperate taskbar icons. It will be more convenient to check my codes. How could I access it? Pleaze help me.