It now works 
It will crash without locale emulator, but it runs fine with Japanese locale. Config screen now nothing fall off screen, and it can run directly from 1/ed6_win.exe.
Running the installer FSetup4.exe also requires locale emulator, but after installation, the desktop shortcuts can run with and without locale emulator. (Though without locale emu – bakemoji at title bar.)
The only curious thing is – Why do I need to run install at all?..
Nice BGM and scene at the very beginning, btw.