Sparrow for Mac resets after quitting Every time I quit and relaunch my Sparrow email client I am prompted with the setup screen. All my accounts and preferences are reset. It's as if I just installed the app for the first time again. 

I'm not exactly sure how I got the app into this state but reinstalling it does not fix the problem. I have also tried searching my Mac for and deleting all files and folder that contain sparrow in the name, and then reinstalling but still no luck. 

I've emailed Sparrow support quite some time ago and no response. Has anyone ever encountered this problem?
Sparrow's development was halted quite a while ago, and as OS X has developed, Sparrow hasn't kept up.

Most notably is the addition of Containers for app's data and I speculate that this is causing some problem with some code in Sparrow. Obviously, this is speculation as I haven't seen Sparrow's source code, but I don't think it's something that you can fix yourself—it's most probably a bug in Sparrow's code.