Thanks HadToRegister, hadn't figured it would be listed on that tab/page. In my tired defense, when you go via the Vortex button of the mod page, you of course skip past that all that.
I am trying to mod Subnautica and Vortex keeps complaining QModManager is not installed, even though it is installed (see screenshot). Is this a current known bug? A quick look through the log doesn't show anything remotely hinting at a problem, other than this message.