I think you are doing what you can for her.
Sadly, I think she will probably have it again. At least that's what I have seen with my hens. They can get better for a while, then not feel well and back and forth.
If she's had reproductive problems, then likely it's another 'episode'. I've had hens wax and wane for months until they needed to be put out of their misery.
You can try treating her like you did the last time and see if that helps. Make sure her crop is emptying and that she's staying...