I can log into the wallet but the address is no longer in my "receive money" part. It's like the address disconnected from my wallet.

You are giving me hope that not all is lost, fingers crossed we can get this working. I read that page you sent unfortunately I do not have "tools --> import private key" on the windows version. Also on that page it says

"Import private keys from blockchain.info
This is no longer supported. The easiest way to move bitcoin is to perform a standard Bitcoin transaction to a receiving address provided by MultiBit."