I am not going to add any identifying information as I want advice related to the process and not the book.
My current project is a bit over 200 chapters and I have a problem. The overall consensus is that the story has bad grammer. The problem is I am not sure how to fix it. I've gone back and made the suggested edits but that's obviously not enough. I am not sure how to catch the mistakes as my free Grammar software is basically a missing comma detector.
On top of that, I am not sure what to do with my work in progress. Its not really realistic to go back and rewrite around 600k words by now. I believe and worry that doing so would hurt more than a new novel. I am not sure how accurate that is.
TLDR: I want advice or software recommendation for grammar improvements and tips for a rewrite vs a new story
Edit: Just to put things in perspective. I have two reviews both of which mention the grammer/editing issue. Several edit suggestions that I have dealt with but they were there. An overall rating of 4.16