You will need the private keys for the addresse(s) you donated from. You can get them from the client you used and need to import them into an account in your client.
- Open up you client
- Let it sync with the network
- Create a new local account (no need to register it)
- Got to the settings of your account
- Go to the "keys" tab
- Import the private keys
- Get the
wallet.dat file from the bitcoin-core/protoshares client and import as "Bitcoin wallet"
- Click
Import
You should see your funds instantly. Also note that you certainly also have a vested balance from the merger with DNS and VOTE. You can check the balance with wallet_check_sharedrop and claim your vested balance using wallet_collect_vested_balances accountname. Note, that the vested balance can be collected over a 2 year period, no matter the exact date of collection (except for the transaction fee).