Ouch, that top 1-star review is pretty damning, and right at the top. That's got to be a major buzzkill on your DLs. I wonder if you could address that somehow in your description. Actually the CA seems interesting to me.
That review was a huge buzzkill personally, and it had a very big effect on DLs. 2-3 a day, down to 1 a week or so. Prior versions had a good number of 4 and 5 star reviews, nothing lower, with some good comments.
Easiest way to address it would be to push out another update, but that review was months ago and it kind of knocked the wind out of my sails (not to mention my sales!)