IMPORTANT! The DGW adjustment will activate on block 338778, which will result in a hard-fork of the Ravencoin chain. Please apply the v2.0.4 binary updates as soon as possible in order to ensure that your wallets are on the correct chain after the fork. Anyone not using the new software upon the activation at block 338778 will be "forked off" and will remain on the counterfeit blockchain.
To upgrade:
1. Shut down your wallet....waiting to make sure it has shutdown...
2. Back up your wallet.dat file - it's always good practice to have this securely backed up.
3. Download the installer or raven-qt executables for your OS, run the installer or replace the raven-qt executables on your system.
Open up raven-qt again as before and check the version help > about.
For a more detailed steps https://coinguides.org/updating-wallet-bitcoin-litecoin-dash/ is a good starting point.