Hi, there are several possibilities the most likely of which is that the address is dis-associated from the wallet and you need to add it back in (just create another new address in your wallet). (The wallet maybe looks differently because after update the encrypted wallet profile on the server was gone, so server-specific things like address aliases that you may have setup are gone too. But addresses are tied to the pass phrase and cannot disappear).
Other than that there are scripts (see below) that can help you generate a list of addresses in the wallet (and private keys too, if you want).