The plugin website FAQ indicates that the plugin options page includes the option to un-ignore words marked for "ignore always":
In WordPress you can visit the After the Deadline settings page (the same place you input your key) to unignore errors.
I do not see any such option or setting on the profile settings page.
The plugin settings page indicates that options are available on the user profile page:
Visit your profile page to configure After the Deadline proofreading software options.
Are there supposed to be options or settings for AtD on the user profile page? All I see is the following text:
WordPress checks your grammar, spelling, and misused words with After the Deadline. This feature is available to blogs set to the English language. Blogs in other languages will continue to have access to the old spellchecker.
Am I missing something?