V-sync setting cannot be saved

[mc0406]

The vertical synchronization setting cannot be saved in the latest version, as well as in some previous versions. The game works well without vertical synchronization when I set it to "disabled" before starting the game. However every time I set it to "disabled," the setting resets to "enabled" after closing and reopening the program.
It is hoped that this error can be fixed in the next version. Thank you.