Q: Can't access iPhone apps via iTunes

Hi.  I'm trying to reinstall a weather app I deleted off my iPhone recently, but I keep hitting a brick wall be it either through iCould on my iPhone, or via 'unexpected quitting' of iTunes.  I'm focussing on the latter problem as I like to manage my phone via my Macbook Pro.  It's running OSX 10.6.8.

Via my iPhone, I go to the app store and can see my app is in the 'bought' list, but it's on iCloud and my phone keeps timing out trying to access the data.  I'm properly logged into iCloud and my account is verified etc.  I've logged out, reset my phone, shut it off, logged back in, but same problems each time.

Via iTunes, i'm able to get into the 'my iPhone' GUI, I can click on every menu option (ie - summary, info, music, movies, etc) with the exception of 'apps'.  If I select 'apps' iTunes 'quits unexpectedly' each and every time.

How to resolve this issue?  I just want to revert to the older weather app I used, quite easy in theory, but since installing iOS7 I can't seem to complete the process.