no, you just upgrade and the new version will open the old wallet and you will be good to go.

but as i said it is a good idea to keep a backup just in case something went wrong. in your case make a copy of your wallet file and write down your private key(s) on a paper (eg. printing them in which case make sure your printer is not storing them in its memory).
your wallet file is here: %appdata%\Electrum\wallets
and your private key can be found either by right clicking on each address in your "Addresses" tab and selecting private key then entering your password. or you can go to "Wallet > Private keys > export" from the menu and export all your keys.