It's my first message and I'm crying...
I had about 3.5 bitcoin, I tried to use some a short while ago and got a message that there is a compulsory upgrade.
I downloaded and installed the upgrade on my iMac, restarted Electrum, and then it happened...
It immediately said there was not enough funds to transfer the amount of ALL my coins but continued trying to process it until it eventually said there is a zero balance.
BOOM! EVERYTHING IS GONE!!
:-(
Unfortunately you lost your bitcoin with a hack that has been around for more than one year and a half, I'm really sorry that you have lost so much bitcoin because I know how difficult it can be to obtain it, it seems to me that you left your bitcoin in your wallet for a very long time without updating your software wallet and as such you were not aware of the risks that you were victim of.
It is very possible to secure your coins properly with a software wallet, but you need to be honest with yourself about your capabilities and if you cannot do that then it is better for you to get a hardware wallet, I know it seems too late but if you are still planning to buy more bitcoin or if you have more bitcoin in other wallets then get a hardware wallet as soon as you can.