could not load the wallet file "C:\Users\abcd\Downloads\multibit 1 wallet\multibit.wallet".
The error message was "org.multibit.file.WalletLoadException Could not load wallet 'C:\Users\abcd\Downloads\multibit 1 wallet\multibit.wallet'. Serialized wallets are no longer supported."
can anyone tell me how to open OLD wallet ?
Maybe install the old version, open the wallet and export the keys as .key file. Then uninstall and install the newest Version, create a new wallet and import the .key file again.
To get your old address labels back you can use the contents of the old .info file, maybe its even enough to replace the newly created .info with the old .info file.
Make backup copies of all files before you begin moving files around and opening them.Unfortunately my Wallet-Key-Tool will probably not help here because its only using the original (and newest) Multibit code to read the .wallet files, so it will probably fail too.
