You used your Bitcoin private key to get the Bitcoin Cash.

According to ELECTRUM they do not know the person that wrote Electron Cash. They pointed out the software is not digitally signed or any contact information is made available.  Big RED flags. Electron Cash may be legit or maybe not

I strongly suggest sending the Bitcoin Cash out to an exchange that supports Bitcoin Cash deposits or to a legitimate Bitcoin Cash Wallet.

I strongly suggest you EMPTY the Bitcoin Wallet you used to get your master keys or master seed to get your Bitcoin Cash to appear in Electron Cash

Deleting Electron Cash is just a precaution. Reformating the computer is a paranoid solution in case electron cash left a piece of software that looks for and steals Bitcoin keys