What about now?
"Go to Electrum website, click on download, then click on ThomasV, this will redirect you to the MIT website, click on a 7F9470E6, this will redirect you to ThomasV public key, select all and save it as ThomasV.asc.
Go back to Electrum website and download Electrum-3.0.6.tar.gz and its signature Electrum-3.0.6.tar.gz.asc
Copy all the 3 files to the same folder, open the terminal and use command 'cd' to navigate to that folder and run these commands.
gpg --import ThomasV.asc
gpg --verify Electrum-3.0.6.tar.gz.asc Electrum-3.0.6.tar.gz
If the message returned says Good signature and that it was signed by ThomasV with a fingerprint that ends with 7F9470E6, then the software is authentic."