If your girlfriend has been a JW for forty years, then she has believed the end was close for forty years and it has not once occurred to her that they were wrong forty years ago, so it's unlikely anything you say will make any difference. I was told I would never have time for a career "in this system of things" (in the Awake magazine), I am 61, yet they still tell young people the same thing. Mostly JWs become defensive when challenged, then shut down, so that hardly ever works.
As for apostates, JWs have been so conditioned to fear them that it is unlikely you will ever make her listen to anything we have to say. You could try the tactic that truth should stand up to scrutiny, and that if what she believes is logical and make sense then she should not be afraid of her beliefs being challenged, but don't hold your breath. I was so afraid of apostates that it wasn't until eight years after I left the religion that I came here, it took that long for the brain washing to wear off, the fear is that deeply rooted. Keep in mind that she has been attending hours of meetings brainwashing sessions for forty years.