Redux sneaked in uninvited

I have been a happy user for a few years and installed this plugin on many sites. I now find unwanted software called Redux has been installed on my websites without my knowledge or permission.

It appears under Settings with no ability to remove it.

I will be uninstalling this plugin until the various ‘hidden’ software items are removed.

It’s a shame as this was/is a great plugin but I can’t trust anything that sneaks in other software without asking first.