This thing needs to use threads. It's almost embarrassing to not make use of that when facilities like Grand Central are readily available.

The app locked up for me beach ball-style when doing an update. There's no reason for this. Do not block the UI thread. Ever!

My first thought after clicking a single button. GCD threads are cheap and easy - just launch a spinner and start a thread, don't block the main one.

I updated and it looked frozen as well. After a long stroll the coffee shop, it appears to have came back and reported a successful update although the "Outdated" icon still shows the same amount as when it started. Regardless, I applaud their efforts.