It sounds like you want the opposite of what Force Login does. I suggest you use another method to make only a few pages private instead of using this plugin which makes everything private.

1. You could use the built in WordPress functionality to mark those few pages or posts you want to require login as “private:”
   https://codex.wordpress.org/Content_Visibility
2. Or, add a custom script to your functions.php that checks if the user is not logged-in and visiting the specified page(s) to redirect them to login.