is it showing the right addresses and transactions? check any wrong addresses and transactions on block explorer and see if they match. if the block explorers shows your correct balance and transactions then you're fine and can just import the private keys to some other wallet.

also on upgrading electrum (if you want to try again): save the copy of your wallet and export your private keys(!), uninstall electrum, then try to install the latest version again (if you get a "permission" error message, run it as administrator) and open the saved copy of your wallet from there.