I’m posting this for 2 reasons. #1: I am so overwhelmingly glad I know this information now, and #2: I want Rozen to know this info too.
Basically, you make a shortcut on your desktop to the game you want (SCR in your case; the actual game exe, not the “launcher” exe). Then, you right-click it and select Properties. From there, go to the Target line and add “-launch” so that it looks something like ...\StarCraft.exe" -launch noticing the space between the " and the -.