You don't need to click the simplify workflow button to add/remove statuses from a board. Assuming they exist in the workflow for the project it's a drag and drop action.
If you are trying to edit the workflow itself, check the project roles/permissions to insure you have access, being a "Project Admin" does not always mean you have access to every project. Also, I would not modify the JIRA simplified workflow it's self, suggest you make a copy and modify that, unless you want to update all existing and future projects.
Over the next several weeks we'll be sharing some of our Getting Started guides here in the community. Throughout this series of posts, we'd love to hear from customers and non-customers ab...
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