I just went through something similar with PSE 9--had another motherboard go out (3rd time this year) and when I reloaded the software, it told me I was past the limit for my license (I had a 2 concurrent machine limit). I spent the afternoon on the phone with Adobe and they reauthorized it for me. Do you have a place to call for iTunes support? (I don't use iTunes, so I've no clue.
I hope you get it straightened out soon. I turn the air bluest when I'm dealing with techie problems