I only use sketch maybe once every few months and the most basic features. When I need to use it, I need to use it in a hurry and don't want the confronting and intrusive updates available box to pop up. It's very unlikely that I'd be using any new features, and it's very unlikely that there are bugs with the basic features that I do use – and if I did have problems with them, I would manually update anyway.
(Besides the bad user experience, – I was using internet on a flight not long ago, I didn't download the update for Sketch of course, but just the process of checking for the update itself cost me money, even though it was only exchanging a few kilobytes.)
Is there a way to disable checking for updates?