Rated 1 out of 5 stars

Spellcheck works. I can't say the same for the grammar check. And yes. I checked them all in the options menu.

This review is for a previous version of the add-on (1.0). 

Could be a plugin conflict

The first version (1.0) of this add-on had a conflict with many add-ons because of a poorly named global variable in our code. Is it possible AtD wasn't enabled for you and you were just seeing results from the built-in spell checker? You have to click the AtD icon in the text box to get AtD checking.