I'm sorry to tell you this but I really doubt a literal answer to your question makes anything better longterm.
Here's the situation: Your wife has been hurt and now she hurts herself with those memories and what she feels those memories mean for her life. If she keeps that up, she might eventually create what she fears. Driving you away because being suspected of cheating for years might make you fall out of love and the very fear of losing you might become a reality. At best the marriage becomes stale. It seems to have already started.
I do not think it helps if you try to make her not be jealous because she's jealous for a reason. Maybe not a good reason but her feelings of insignificance and uncertainty are real and won't go away by being bottled up or by being made wrong. Whatever brains do, think or feel, they do it for a reason and they usually need a better alternative to get the same result in order to let go of the old behavior. Because in a way, the old behavior is needed.
She desperately tries to save the relationship with you, she's just pretty clumsy. So honor her intent, just not her approach. She wants to keep you in her life. That's a good thing.
Here's the question: how exactly did you help her forget the bad past? Have you stopped doing anything that has helped before? Most couples do. Change that.
Because while blaming her might be justified, it's you and you alone who can do something about it because you are the only person you have control over. So being the person she wants in her life gives you lots of opportunity to influence her positively. And you can use that. And you should.
How often do you surprise her with something she really values emotionally? That screams in her language: I love you? Women do appreciate small stuff men wouldn't care about. How often do you tell her what you like about her? What do you regularly do to make her feel significant and certain about your love? Women need attention. It's mostly inbuilt.
What I suggest is to get off the autopilot. A relationship does not happen, it is built and maintained and nurtured. And there's lots of little things that need to be done on a regular basis that are never urgent or pressing, just important. So they get neglected easily and people then wonder why the relationship isn't as much fun as in the old days. And why your wife mostly focuses on her fears. Obviously she's not busy enough with thinking about fun stuff.
Here's a mean excercise. In a quiet moment, take the time and look her in the eyes and give her a chance to tell you what she feels. I mean really look in her eyes. Not 10 seconds, not a minute. As long as it takes to really feel her. Give her presence. Feel her pain. Don't think of sports. Look in her eyes and really keep making her and her feelings the only important thing for a moment.
See the woman you love through all the dumb behavior and the hurt and let her express herself and love her the whole time. When your eyes start to water you're partly there. Her feelings need to be acknowledged or she will feel you don't take her seriously and she won't be open for change and won't listen. In the end she must own the decision to let got of the past but at the start of change her status quo is right.
When you come from a place of love and not from a place of hurt feelings because she does the wrong thing, you can, in that momen, take her for what she is. A beautiful soul, the woman you fell in love with, deeply hurt, deeply afraid of losing you. If you think of what she does wrong, you are not with her, but with yourself and that won't help you a bit in getting her trust. Because she will sense that you are more concerned about yourself.
I do not suggest becoming a martyr. Neither do I suggest pleasing her so much that she'll lose all respect for you. I suggest opening her up. Before you have opened her, she won't be open to change because she thinks she cannot do better than to control you. And you open her with love that she feels, with the feeling to be understood and with presence. If you give her ground to stand on, she will have better options than to cling to the bad past and to control. Her jealousy is a symptom not the problem.
In the end, behavior that gets reinforced gets repeated. The trick is to find the right, fitting reinforcements. Remember: the brain you want to influence makes the rules. It can be an amazing game to find the right levers and use them and see her gain more freedom and more trust. Make no mistake: you both train each other and reinforce behaviors and change each other anyway. You just don't do it consciously and it hurts you both. The current change is not improvement. Autopilot is bad.
Here's another very valuable game you two can play: Arrange a few quiet hours in an environment that makes both of you comfortable and then try this: You try to explain to her the whole situation. Easy, right?. But from her point of view. And you are not finished until she is satisfied with the result. And when you have her full approval of what you said, you switch roles and she explains to your the situation from your point of view until you are satisfied. It forces both of you to understand each other.
You can train pattern interrupts. By now both of you are probably accustomed to act and react a certain way. Have you ever been as polite and friendly as possible to someone who deserves it the least? Your friendlyness being stronger than their negativity? Leading intelligently instead of following aggression? That's a pattern interrupt. They just don't know how to interpret it. There are better reactions to jealousy than hurt feelings or conformity. That needs exploration and study and training. Martial artists can react well because they train. Dancers can move amazingly graceful because they train. The same goes for any social situation. But they actually train, they don't just move. That's the difference between their skills and most people's social skills. They don't train, they react and make do. It's the difference between a ballet class and a walk in the park. That's why the results are not always pretty in everyday life.
You have not won when she understands that her jealousy is wrong, you have won when she feels inside that she doesn't need her jealousy anymore. Two very different things.
One could write a whole book about this because the solution depends on rules and beliefs in your heads. Those dictate what new behaviors you have to train in order to encourage new behavior in her. Course changes that make you both happier.
There's a video called relationship storms by Robbins Madanes. Pretty good knowledge. Maybe you find a used copy.