How can i get my bitcoins from the old version to the new ?
When you update Electrum, all you are updating is the software which opens your wallet file. You are not changing the wallet file.
The were send to the adres of the 3.0.2 version, but the didn't arrive.
Versions of Electrum earlier than 3.3 will not sync to protect against a vulnerability, so you would never see the coins arriving when using 3.0.2. You should update to the latest version, 4.0.9, by following the links Rath_ has shared above, and then open your wallet file with that version.
If when you open your wallet with 4.0.9 you still cannot see the bitcoin you sent to your wallet, then you are either opening the wrong wallet file or you sent the coins to the wrong address.