Hello,
thank you for reporting this issue. It seems that there is an error in Launcher when handling a crash in the game that causes Launcher to crash too.
I'll fix the issue with Launcher and I'm passing your issue to our customer support so they can help you with the crash in the game.

If it is possible, could you upload a troubleshooting package with the game reports and other diagnostic information. You can create it from Launcher, from the menu in the top right corner select "Prepare Arma troubleshooting report...".