There are two options to move your coins into the new wallet:
Send the coins from the 4.x.x to the 5.x.x wallet
This is pretty straight forward, just open your 4.x.x wallet and send the coins to the new 5.x.x address, as you would do with any other transaction.
Import the old secret (Private Keys) via “Tools -> Import Private Key”
Enter the secret and the current wallet password and your coins will be imported.