Enables flexible revision management for you.
From WordPress 3.6, proper posts have a copy revision of the current post. Without a copy revision, updating a post results in loss of current content. So when TOR find a post without copy revision, it will warn you to create a copy.
This plugin is using wp_cron even if you press the 'Remove NOW' button. When you press it, the plugin just schedule a task to delete revisions as an immediate wp_cron task. And it will take a while until the task is completed.
So please wait a while after you press the button.
You can go to revision.php by choosing a revision on 'Edit Post' or 'Edit Page' screen. If you can't see any revisions on the screen, check the 'Revisions' option in Screen Options at top-right of the page. If you can't see the 'Revisions' option in the menu, I guess you still don't have any revisions. So edit the post (page) and save it first.
'Delete revisions on initial publication' feature is effective only when you first publish the post from 'draft' status. It has no effects if you had once published the post and changed it to 'draft' status later. Also no effects on auto-saved revisions.
It will appear in 'Edit Post' ('Edit Page') screen. Make sure that you check the 'Revision Memo' screen option in the page.
In version 3.6, WordPress has improved its revision management feature. As a result, WordPress 3.6 stops creating unnecessary revisions during quick editing and bulk editing. So some options became needless.