Quote from: Shaddyr on Today at 09:56:08 AM

-snip- I can upload previously used standalone - it wasn't deleted. And it was checked by an antivirus without any warnings as well as all other files on my laptop

You can check the validity of each executable yourself by verifying their signatures.

Follow this guide to on how to verify your Electrum download: https://bitcoinelectrum.com/how-to-verify-your-electrum-download/
Signature files (.asc) for the older versions can be downloaded here: https://download.electrum.org/

By the way, Antivirus can't be a good indicator since even real Electrum, specially the older versions usually have false-positive detection from some Antivitus software.