Minecraft Windows 10 can't start

That's simple. When I start Minecraft Windows 10 Edition, a Minecraft window open, and it disappeared after a few seconds.

I've tried to re-install and reset (function in windows parameters). But after I've re-installed, and launched I've found a message "Can't find a file of this theme. Would you save the theme ?" I click on "Yes" just 1 time and on "no" 3 times