I have been a lifelong evening snacker, so I've accepted that even if I've had a healthy, filling, nutritious day of eating, I still crave "something" in evening, at least psychologically. This might be the same for you.
However, I've replaced unhealthy snacking with something simple - fruit and tea. I will have a small bowl of berries and a cup of herbal tea, almost every night. Sometimes no berries, and just tea. It's just right for me.