Export private key worked in all versions of wallets DMD.
You waited 4 years for this moment?
Just curious why you didn't wanted get your POS income.
if you need old wallet DMDv2.0 (for extracted from the file wallet.dat private key), then you can download it here https://github.com/DMDcoin/Diamond/releases
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Thanks for the reminder about the private keys.  At the time DMD was released lots of other alt coins were being released too  anoncoin, frankcoin, fastcoin, earthcoin..... etc. So at the time I mined them all then backed up each of the wallet.dat files, Then I gave up on altcoins. Now 4 years later I going through each of them to see whats alive.

Anyways after a refresher course, I have exported the private keys to each address in the wallet.dat file and imported the private keys into wallet 3.0 and all is good now. I had totally forgotten how cryptos work.

Will now also backup private keys as well keeping the wallet.dat from now on.

This wallet.dat is even before 2.0. i cant even do the first step. are the dmds lost from the early wallets becuase the developers changed things?

Hello. I have a wallet.dat file that I last used from Dec 2013. I know is has a bunch of diamonds in it and I know the wallet password used at the time. How do I transfer this to the latest diamond client.