How to downgrade Grav from RC to stable version?

I am getting some errors (either due to Grav v1.1.0-rc.1 or Admin v1.1.0-rc.2 plugin) so I would like to downgrade both to stable, production version. How can I do it on my live, production code?

Best thing is to report those errors if you haven’t already, otherwise we’re going to have them in Grav 1.1 stable until sorted.