EV3 open first project no problem, but when I open second project it crash and exit. I tryed install EV3 software on Windows 10 (MS Surface laptop i7,16GB RAM), or on Windows 7 (Thinpad i5, 16GB RAM), remain the same. Please guide me how to fix it. Thank you very much.
If the same project crashes your software on multiple installations, the problem is the project file itself. Sometimes files get corrupted. Unfortunately the only real solution is to recreate your project.