Well. I think you might find that it does save it; it's just that mIRC itself doesn't reread your changes to the file since it has already read it and knows what its settings are. The next time you use a built-in dialog to make changes, it will save again, overwriting any changes you made. You can force the save with /saveini (no parameters). This is useful if you alter a setting through a command. mIRC doesn't immediately update $mircini when you use a command rather than a built-in dialog. (It's the OK button that causes the write, which doesn't get called through a /command interface). That is why /saveini is available.
