I put it down to desktop utility apps being a very tough market because 1. they are time-consuming to develop and 2. people hate paying for desktop software. You already have several comments in this very thread from people complaining about the price:

* https://news.ycombinator.com/item?id=43102477

* https://news.ycombinator.com/item?id=43099230

* https://news.ycombinator.com/item?id=43097749

Ah and yes, I'm still getting a handful of fman sales per month. But nowhere near enough to justify any time investment.