Nobody mentioned it because that's the Electrum version for Litecoin.
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...
In any case, this is a great day to be reminded of the possibility of a man in the middle attack happening.
You should always check the checksum of the executable, assuming you are not going to build the code yourself, otherwise nasty things can happen if you are extremely unlucky to be exposed to the attack while the people that host the site realize the checksums are different from what they signed.