Electrum for BTC and Electrum for LTC (this one you are talking about) are developed by different teams. This wallet is a forked version of Electrum (BTC) wallet which works for Litecoin. Nothing to worry about if you use Electrum for Bitcoin.
Well, I just realized I made the mistake of thinking this was related to BTC. It is indeed the LTC wallet which I assume is just an Electrum fork for LTC...
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Please change this thread's title to say "The Electrum-LTC website was hacked in Jul 31" instead of "The Electrum website was hacked in Jul 31".
The current title is misleading, and will make electrum for Bitcoin users unnecessarily panic. Please make it clear it was the litecoin version that was compromised.