Hello, the old wallet is not in function Anymore. The dev is notified and will tell if there is a way to recover these old coins but I doubt.
After that
You will need to download the new version from the github.
Then discard the 4 .dat files of the former blockchain and run .exe
Yes, Ty i'm upgrading the wallet.. but if i sent a transaction with old wallet? i lost the coin ?
Normally you should see again the coins in your balance after upgrading the wallet.