MacOS – is there a way to disable update notifications in iWork apps (Pages, Keynote, Numbers)

So, is there a general way to ensure my Keynote presentation time is uninterrupted?

Unless I know I'll absolutely need network access, I just turn off all network interfaces while I'm giving presentations. This effectively blocks any auto-update routines from running without having to disable and then re-enable the feature in any piece of software I might want to use during my talk.

I'll also shut down all the programs I don't absolutely need running during a presentation. In particular email, instant message and any sort of communication apps that could cause a notification bell or a preview to pop up on my screen get shut down.

I'll pause Growl (Growl icon in menu bar -> Pause Growl) so notifications don't interrupt my presentation.

And I'll switch from any customized backgrounds I might have to some corporate logo backgrounds.

I'll even clear my browser history. Not that there'd be anything lewd, but there might be competitor's websites or company-sensitive information that can be given away by URLs that auto-complete when I start to type in the browser.

That's my usual pre-flight check before I use my laptop in public presentation.

Apple doesn't offer a way to move iWork licenses to the App Store. There isn't much to gain from such a move anyway because new major releases of iWork have (at least til now) always be sold as full versions only (which still was cheaper than e.g. MS Office upgrade versions).