The default wallet location for mainnet has not changed, it is still %LOCALAPPDATA%\CredaCash\CCWallet-1 and the wallet file name is still CCWallet.ccw. If your wallet file is no longer at the location, you would need to locate it and move it there, or set --datadir and --wallet-file to point at the wallet by using either the command line options or editing ccwallet.conf. (Note that if the wallet file is totally lost, it can largely be reconstructed and the funds recovered from the master secret and password if you still have those.)