That's a first. So it worked before but not now? My only guess at the moment is that the save file that stores options data is corrupted, and potentially the meta-data for save files, causing a crash.
Try this, go to this directory: %APPDATA%\Godot\app_userdata\Verdant_Gale, and delete Options.json. If that doesn't fix it, try also deleting General.json.
Both files are read on startup, so if they're messed up they'll likely cause a crash.