@Paul:

1) Please add KeypassX to the list of problem apps (in case anyone else experiences the same issue, Google might then help them)

2) Please reconsider the comment you left previously about not emailing users because the update was only up for 48 hours. An email, especially one worded like your blog post, would alarm very few users in my opinion. A few people would check their version and roll back if they cared. No big deal.

On the other hand, I recently upgrade my ram to 8GB, and thinking the fault lied there, wasted a lot of my time learning about and running memtest, as well as HD diskutils, calling AppleCare, trying to decipher crash reports, etc.

I think the cost/benefit of sending out an email would make you look proactive and helpful; whereas instead I now feel annoyed at your company that wasted my time when a simple email would have set me on the right path.

I love AirFoil! But communication is never the wrong move. And this isn't like the dropbox snafu where - even though they were under an even greater ethical obligation to notify users - that email would have understandably led to lost customers and concerns about their security. Not the case here; you had nothing to lose.